Thanks, Rob. Our focus during the first quarter was similar to that of the fourth quarter, delivering our LiveEngage platform and rolling it out to a greater number of customers while continuing to make investments in infrastructure, people and processes. Last year, we added headcount, made several technology acquisitions and completed the ENGAGE acquisition in Australia. This year, we'll continue to invest in the business to support our long-term growth initiatives. While it would take some time to fully realize the benefit of all the investments, we remain confident in our overall strategy, and we've made some good progress so far and we'll continue to make progress throughout the year. During the first quarter, B2B revenue was $38.9 million, an 18% increase as compared to the prior year quarter. Now overall growth rates for Q1 in B2B, excluding small business, was 23% year-over-year. Total revenue came in at the midpoint of our guidance range, increasing 16% as compared to the prior year, to $42.5 million. Revenue from the consumer operations for the first quarter of 2013 was $3.6 million, which is down 3% from $3.8 million in Q1 of 2012. During the quarter, we had approximately $900,000 of foreign currency loss that impacted our financial metrics. While our results are often slightly impacted by foreign currency fluctuation, the impact this quarter was unusually high as compared to past periods. The loss is primarily generated through the exchange rate between the U.S. dollar and the U.K. pound. All metrics that I discuss in this call, including adjusted EBITDA, reflect the impact of the foreign currency fluctuation. First quarter adjusted net income per share came in at $0.06 as compared to $0.09 in 2012. GAAP EPS came in at 0 for the first quarter of 2013 as compared to $0.06 in 2012, and adjusted EBITDA per share was $0.09 as compared to $0.16 per share in the first quarter of 2012. All 3 measures were impacted by the negative foreign currency fluctuation, primarily from the U.K. pound. Bookings were $7.5 million in the first quarter, which is 22% higher than the first quarter. We had a couple of large deals that are expected to close in the quarter that were pushed out, and we experienced some weakness in the European market. As a reminder, LivePerson defines booking as new contractual commitment from new or existing mid-market or enterprise customers that excludes nonrecurring revenue. This metric generally represents contracts with committed or current subscription fees and does not capture usage or performance-based contracts. In Q1 2013, we signed 149 total deals in the quarter compared to 117 deals in the first quarter of 2012. During the quarter, we added 43 new enterprise and mid-market customers versus 28 in the first quarter of 2012. Our small business group's revenue grew by 3% in the first quarter when compared to the first quarter of 2012. Average deal size for all deals was 51,000. The average deal size for new customers was 51,000. The average for existing customers signing up for an upsell or expanded business was 50,000. Similar to our booking metric, this metric generally represents contracts with committed or current subscription fees and did not capture usage or performance based contracts. The breakdown of enterprise and mid-market bookings and revenue turns is approximately 70% existing customers -- existing customer expansions and approximately 30% to brand-new customers. As Rob mentioned earlier, we had an unexpected increase in attrition in the quarter. Customer attrition for enterprise and mid-market accounts averaged 2.9% during the first quarter, which compares to the 0.9% in the fourth quarter. Q1 is typically a higher attrition quarter, as customers are resetting their budgets for the year. In addition, the increase in attrition is predominantly driven by one large customer cancellation and some softening in the European market. While the attrition had minimal impact on Q1, it will have an impact in Q2 through Q4. We do not currently anticipate that the higher than expected attrition in Q1 is a trend, but we're monitoring closely. Small business attrition rates average 2.6%, which is consistent with prior quarters. Pay-for-performance generated approximately 16% of total enterprise revenue and 9% of total revenue, consistent with fourth quarter and prior year first quarter. Revenue coming from outside the U.S. is approximately 29% of total revenue, with the U.K. representing our largest concentration outside of the U.S. The increase in international revenue is primarily driven by our presence in Asia-Pacific through the recent ENGAGE acquisition. The revenue breakdown by industry verticals was consistent with prior quarters. Telecommunications made up 32%; financial services, 25%; retail, approximately 13%; technology, 13%; and other at 17% for the quarter. In terms of the scope of our customers, at the end of the first quarter of 2013, we had 36 customers above $500,000 in annualized spend, and we have 13 customers spending more than $2 million in annualized spend. We believe this continued opportunity with our larger accounts to grow organically and build more strategic relationships, especially as we roll out the LiveEngage platform. First quarter gross margins came in as anticipated at 76%, which compares to 78% in the first quarter of 2012 and 76% in the first -- fourth quarter of 2012. In Q1, we had full quarter of amortization for both the Look.io acquisition and ENGAGE acquisitions. And in Q2, we expect the beginning amortization of the Amadesa acquisition as we continue to roll out PT.2.0 technology for our customers. We ended the quarter with a cash balance of approximately $95 million, which compares to $103 million at the end of 2012. We had $1.7 million in capital expenditure for the quarter related to service, computers and the build out of office space. In addition, we purchased approximately $7.4 million of common stock in our corporate buyback program. First quarter accounts receivable were $24.6 million. Our DSO metric for the first quarter of 2013 was 50 days, which is in line with the fourth quarter. As discussed in prior calls, we are comfortable with the DSO in the range of 50 to 55 days. Our tax rate during the first quarter was 59%. The increase in the effective tax rate is primarily attributable to an increase in nondeductible expenses related to incentive stock options as a proportion of taxable income. Now I would like to discuss the financial expectations for the second quarter of 2013 and the full year, taking into account some of the facts we discussed on this call. As Rob mentioned, during the second quarter, we'll be hosting 2 of our 3 global customer summits, so we expect to see increase in expenses as we ramp up marketing efforts surrounding those events. And also as we fast-track some of our product initiatives to support the platform rollout, and we will have a full quarter impact in Q1 attrition. With that, our current expectations for Q2 2013 are as follows: revenue of $42.5 million to $43.5 million; adjusted EBITDA of $0.05 to $0.07 per share; adjusted net income of $0.03 to $0.05 per share; and GAAP EPS loss of $0.02 to $0.04; and a fully diluted share count of approximately 58 million. As Rob and I both mentioned, during 2013, we're moving ahead with the launch of our LiveEngage platform, which has been rolled out to approximately 4,000 customers and we remain confident in the strategy and the potential of the new platform. 2013 continues to be an important year from the execution perspective for LivePerson, as we're seeing an inflection point in this business model. We spent the past few years transitioning the company from a single product to a multiproduct company and now to a platform. And we plan to make further investments in 2013 we believe are needed to accelerate through this transition and execute on the next big piece of the strategy. We're adjusting full year guidance based on the full year impact of Q1 attrition and the softening European market and increased investment necessary for the additional resources behind sales marketing and R&D to support the rollout of the LiveEngage platform. In addition, we do not expect to recoup the foreign currency loss previously mentioned. With that, our current expectations for the full year 2013 are revenue of $174 million to $179 million; adjusted EBITDA of $0.32 to $0.35 per share; adjusted net income of $0.18 to $0.21 per share; and a GAAP EPS loss of $0.02 to $0.05 a share. Fully diluted share count of approximately 60 million. However, full year 2013 assumptions include: amortization of intangibles of approximately $4 million; stock compensation expense of approximately $13 million; depreciation of approximately $10 million; and effective tax rate of approximately 40%; a cash tax rate of approximately 40%; and capital expenditures of approximately $12 million. We expect gross margin on a GAAP basis to be approximately 75% due to the amortization of the Look.io, Amadesa and ENGAGE acquisitions running through the cost of goods sold. And as a reminder, our cost of goods sold continues to be sensitive to foreign currency fluctuation. Furthermore, as a percent of revenue for the year, we continue to anticipate sales and marketing to be approximately 35% of G&A, G&A approximately 18% and R&D to be approximately 19%. That covers all the operational highlights. And now, if the operator could rejoin the call, we'd be happy to take questions from folks participating in the call. Operator?