What's going down at Under the Radar, the "early stage technology innovation" conference happening right now? News Corp. company Fox Interactive is shopping, apparently. According to ZDNet's Dan Farber, Fox's Ron Levinson revealed yesterday that he had just bought one of the companies at the event. Which company? Well, the ink isn't yet dry on the deal and Levinson isn't saying. Farber speculates that photo search company Riya (whose service isn't even in beta yet) is a good candidate. News Corp., you'll remember, bought MySpace last July for $580 million, and Levinson says he has a $2 billion "war chest" for buying companies and he would bet that he'd end up buying five more of the 32 companies present at the event. Head over to Farber's post for a video clip of the Levinson interview.