should i upgrade my ipod touch 8gb from 1.1.1 to the new 2.1? It has already been jailbroken but I really want to sync with my exchange server when I go on a trip in a couple of weeks. Are there any applications (jailbreak or iTunes) available that will let me sync with my v1.1.1? Is this something that going to regret? Especially since I'm going to have to buy the upgrade! Thanks for the help.