There is now a jailbreak for it, the programme is called Blackra1n, it has been found that it can jail break all the ipods (even 3rd gen) and iphones, to get it go to blackra1n and click the windows button at the bottom of the web page. This will open up the file to be downloaded, then open it up, click make it rain and in about 30 seconds it should be jailbroken.
The only thing about using it with the ipod touch 3rd gen is that it is a tethered jailbreak, so if you turn the ipod off and try to reboot, then you need to reconnect it to the computer and click make it rain, to jailbreak it again, this time it takes less than the orininal.
But if you don't want a tethered one then i would say wait a while for the dev team to release one soon.
