With the iTunes app store pushing 100,000 choices, we're starting to get cognitive overload. Finally, there's an app for that. It's called Chorus, and it takes advantage of the wisdom of crowds. It gives you recommendations from people you know who've already tried an app, or from "App Mavens," consisting of journalists and motormouthed reviewers in whom you might develop trust over time.
If something like this catches on with millions of users, it could become as useful as Netflix's constantly improving collaborative filtering recommendation engine. There are so many applications in the iTunes app store now, anything would help. Best of all, perhaps the mere existence of Chorus could stimulate Apple to put its iTunes App Store on a 12-step program.