Its a waste of time talking about RockBox for iPod Touch. It was never made. You dont want this. Apple, on the 2nd February 2010, released the iPod 3.1.3 Firmware update, however this was barely an update. It came un-announced and is only a fix for minor bugs within the iPod.
A YouTube user that is know for his "tutorials" on Jailbreaking has notified all the iPod hackers that make Jailbreaking programs about this update. The update stops BlackRa1n, BlackSn0w and all other Jailbreaks from working.
If you currently have the 3.1.2 Firmware, I SERIOUSLY reccomend you dont even bother upgrading. Keep the 3.1.2 and install BlackRa1n from http://blackra1n.com/ it is a tethered Jailbreak for the iPod 3G models, for all other models (1 & 2G) it is a full Jailbreak. There is currently no Jailbreaking software that will make a full Jailbreak of the 3G models, and the creator of BlackRa1n, has announced he will no longer be making updates for his program. BlackRa1n is by far the best JailBreak ever made.
All Regards, MStott96
AND REMEMBER, JAILBREAKING VOIDS YOUR WARRANTY >.<