For ipod touch 1g,2g you can jailbreak with redsn0w or blackra1n, but for ipod touch 3g you must jailbreak with blackra1n and it is only TETHERED which means if you shut it off restart it or it runs out of batterys you need to reconnect it to the computer and rejailbreak it for now chronic -dev is working on an untethered ipt3g jailbreak
Blackra1n: http://www.Blackra1n.com
RedSn0w: http://www.redsn0w.com
chronic-dev (ipt3g untethered info) : http://www.chronic-dev.org/bl...
Iphone-dev: http://www.Blog.iphone-dev.org
any more questions just ask