hey I had same issue
I had to restore to factory settings 3 times in 2 days cause that has happened to where it just gets stuck on the apple logo. I waited to see if it would come back up but waited for an hours all it did was get hot and just die from battery draining. Im really pissed at apple at this point im going to go to the apple store this weekend cause this is bull. anyway back to your problem i read on here on another post to press the home button and keep it pressed as you plug it onto your computer. it sends it to recovery mode you loose everything you had on it before so photos and stuff that you did not back up are gone but doing that makes it show up on itunes. 2.0 is a big steamy turd! hope this helps