A final iPhone 3GS jailbreak hasn't been released yet, but that isn't stopping enterprising hackers from trying to get at all that extra horsepower, and some of the first notable hacks we've seen are these updated PlayStation 1 and Game Boy Advance emulator ports, which run way faster than the versions for the original and 3G. The revved up hardware in Apple's latest is apparently capable of running either of these at 150 - 225fps with zero frameskipping, which is pretty impressive. Of course, we'll be way more impressed when the Dev Team releases a 3GS jailbreak and we can hit these up ourselves, but in the meantime there are plenty of videos to with which to while away the time at the read links.

Read - Emulator videos
Read - ZodTTD blog post with more info

Source: Engadget.com