1. You will want to restore from 1.0 to 2.1, because otherwise you will lose a good deal of space from the previous jailbreak.
Restore from 1.0 to 2.1? So I backup 1.0, upgrade to 2.1 then restore again?
No, just press restore and buy 2.1, it will do both of those at the same time.
Thanks I'll do that then. But before I do, do you know if all my data (such as notes, calendar, contacts) will migrate to the new firmware?
ok, somebody on ipodtouchfans.com told me:
"Good rule of thumb if you hit update and not restore everything but jailbroken stuff will be there no matter what"
Is this true?