Darren Herman, founder of IGA Worldwide (and a friend who will be great to catch up with if we're ever in the same city on the same day without a pressing deadline) is selling a social network - namely, is business/market overview and technological assets/developed infrastructure - on eBay. As the founder of a successful, fast growing company, he can't take the time to launch this baby, but he would love it to see the light of day with the right entrepreneur/company.
You can read a bit more of the backstory on his blog. The winning bid, if it meets the reserve, includes some consulting from Darren to help get it off the ground.
Due to my workload, I'll have to pass (I may, however, scour eBay soon for Mets playoff tickets). Darren, I hope your brainchild finds a good home.