GET THIS NOW.
Everyone, check out Eliminate: Co-Op for the iPod Touch and iPhone. It’s a multiplayer first person shooter, and it runs well, even on my 1st Gen iPod Touch, the slowest of the bunch. There’s a nice network of people playing, plenty of weapons and armor to upgrade to, and its TOTALLY FREE.
I’ll review it when I’ve played it more. It’s a lot of fun so far.