I got a feeling Assassin's Creed is gonna get delayed. Check out
www.ps3-hacks.com/ for any homebrew for ps3. But there isn't much yet. According to legend Pardox or someone has a ISO Loader for PS3 but is hiding it like drugs from your parents. Hope it actually is true and releases here someday, then I'll have a reason to upgrade my HDD.
If you want, you can install linux and have a few emulators on your PS3. I've never done it so I don't know how to get blue tooth and all that working for the PS3 controller, but I'm sure you can ask around somewhere or at least google it. Oh yeah, you have to use emulators for the PPC arch. So it really limits what you can do, sadly.