If you've got a certain brand loyalty to the official iPhone Dev Team then take note, they just released their own special flavor of the 1.1.3 jailbreak for iPhone / iPod touch. We guess that with the splitter version already outed (and its secrets revealed to Apple) there was no sense in keeping it under wraps any longer. The hack requires a v1.1.2 jailbroken device with the BSD Subsystem v1.5 or greater installed -- it does NOT upgrade your baseband. All the usual cautions apply hacker-boy so be careful out there, we haven't tested... yet.
Download -- official 1.1.3 Dev Team jailbreak