So after updating to 3.0 and doing some jailbreaking, I found that my ipod no longer works with my FM transmitter. All it does is play music out of the system speaker. Before I jailbroke, I remember the transmitter working fine. The obvious fix is to restore to 3.0 and re-jailbreak, but I don't really want to have to reinstall all of the apps/customizations and stuff. Is there a way to back up what I have jailbreak-wise on my ipod and restore it later?