The grey-market app Any Music Downloader knocked Angry Birds from its perch atop iTunes' Tuesday. AMD would have allowed you to search for any MP3 on the web, download it to your iPhone drive, and then play it back on the AMD player. You even could have synced your newly-discovered tracks back into iTunes to play in the iPhone iPod Player. Don't bother looking for it though, Apple's already yanked it from its store despite the outstanding question of whether or not an app (or website) that links to potentially-pirated material, rather than hosting it itself, is in fact illegal. I guess that's one way to protect your music distribution empire.