Jake Marsh sent along this neat screencast of an iPhone web app for MySpace that he's working on. Facebook basically seems to be the gold standard of social networking web apps these days, and this looks basically just like that one. It is cool that you can look up people right away, but the real improvements are on MySpace's Music pages -- not only can you subscribe directly from the profile, but he's also got it working to play all the music there (usually trapped in Flash, though there is a less easy way around it already). He also says that it might eventually be possible, for songs that are available for download, to get them with one click into the iPhone's iPod library.
Yes, it looks just like Facebook (in fact, it looks like a rip of the mobile site), but why fix something that's not broken? Unfortunately, Marsh is just showing off -- he says that it's just for him right now and he's aiming for an open beta in August. He should probably aim for a little sooner than that: after June, we might all be saying "what web apps?"