I saw this news when I browse Google Stock News. 

It’s barely been a month since Business 2.0 put out this year’s Next Net list, and already one of the companies on it, StumbleUpon, is rumored to have sold itself to eBay (EBAY) for about $40 million. Through a spokesperson, StumbleUpon declines to comment. And I’m waiting to hear back from eBay. (Update: eBay also has no comment).
http://blogs.business2.com/business2blog/2007/04/ebay_rumored_to.html

It is Web 2.0, Big Internet company buy all the users, contents and traffics instead of VC who has no idea how net works.

If anyone has Web 2.0 Idea, sites, get ready for exit plan. Don’t miss this opportunity.