Business.com has been sold for $350 million. They have an interesting back-story as a B2B entity:
“The site was a laughing stock of the industry at one point, when Jake Winebaum and Sky Dayton plunked down $7.5 million on a single Internet domain name back in 1999, making it one of the biggest ever. The company started as a business portal, but went almost bust after the dotcom bubble, and then came back, focused on its directory and vertical search business, as well as the launch of its B2B PPC ads service. Last year it launched Work.com, a business guide which features content from users/experts in various areas.”