GameFly (which is sort of a Netflix for video games) sent along word that they have updated their free iPhone app called Gamecenter [iTunes link]. Not only does it work as an official app -- you can update and add to your queue straight from the app, which is definitely nice, as you can go carry it around a game store an add titles at will -- but the new update adds lots and lots of game information that's even useful away from GameFly. You can browse games on all of the major systems, and check out user ratings and screenshots along with video of nearly all of them. It's pretty well done, especially for a free app.
The app also includes game news from Shacknews as well, which is a nice bonus, but hopefully by now you've got your own way to get any news you need on the iPhone. If you're a GameFly member, this one's a no-brainer, and even if you're not, there's enough per-game content (and quick access information) in the app that it's definitely worth a look.