Online auctioneer eBay (NSDQ: EBAY) announced Q2 revenue of $2.19 billion, up 20 percent from $1.83 billion in the year-ago quarter. The top-line figure slightly exceeded estimates of $2.17 billion. Adjusted net income grew 20 percent to $568 million ($.43 per share) from $471 million ($.34 per share) a year ago — again, this was slightly ahead of estimates. Core marketplace revenue (ebay, Shopping.com, StubHub, and Kijiji) was up 13 percent, while ad revenue within this unit was up 183 percent (no dollar amounts were given). At the communications business (Skype), which is constantly at the center of strategic speculation, revenue was up 51 percent to $136 million. Skype ended the quarter with 338 million users, adding 29 million in the period. PayPal continues to grow briskly, with revenue up 33 percent to $602 million. On the conference call, the company announced the retirement of Marketplaces chief Rajiv Dutta, who will be replaced by Lori Norrington, formerly the CEO of Shopping.com. Dutta will stay around for the transition.