Where does Trulia get its listings?
conorh: This page explains most of it:
http://www.trulia.com/submit_listings/Listings are either: individually entered by agents, fed to Trulia in an XML format by real estate firms (or other aggregators) or screen scraped by Trulia. They also I think have deals with some MLSs to bulk send them listings for member firms.I work for http://www.streeteasy.com we do this for NYC.