Well, that was quick...

...the iPod touch 2.1 jailbreak curve, if that's your thing. There is a good chance that iTunes 8 won't recognize it though, since it can now detect custom firmwares. So if you've upgraded to 8 you might want to think about holding off until the Dev folks release those iTunes patches. And this isn't an official GUI version, so be warned. No iPhone 2.1 jailbreak yet...

http://gizmodo.com/5049060/jailbreak-your-ipod-touch-21-firmware-now