I seem to have come across a really odd and unhelpful situation with my Touch. Since JBing it with ipodtouchmaster's method, the device no longer recognizes its USB connection. This means it's (apparently) not charging and definitely isn't attempting to sync with the host computer. Throwing it in to recovery mode proves this isn't a hardware failure, so it would seem that it has something to do with the JB firmware. I don't suppose anyone knows of a fix for this? Perhaps a configuration file that needs to be deleted or something?