The company plans to start feeding a stream of listings to its Twitter account, complete with searchable keywords and hashtags; Donato said he expects the stream to average at least 10,000 tweets per day-which the company cleared with Twitter in advance.

Oodle users will also be able to post listings to their own Twitter, Facebook and MySpace streams from a single screen. The idea is that since people are already sharing content and personal information on these networks, sharing a link to the couch, bike or used car they're trying to sell should come just as naturally. The exposure to their network should also increase the likelihood of a sale—since there's an added level of trust when an apartment listing or other sales recommendation comes from a source like a friend-of-a-friend or coworker.