i had just tried updating my ipod touch to 2.1 and my itunes to 8.0. so after i did all that stuff, i opened itunes, and it told me files were missing and i had to reinstall it. and i reinstalled it abbout four times, and it still didnt work. so when i went to update my ipod, it went into restore mode, and when i plug my ipod in, itunes never detects it. and i tried it on my sisters laptop and it works fine. so its something with itunes. help!!