iPod will not sync, is stuck on Apple Logo

I would try the following steps:

1. press and hold menu and select for 5-10 seconds to reboot the iPod
2. when the screen turns black for a reboot, press play and select at the same time and hold it for 5-10 seconds (this should put the iPod into disk mode)
3. connect the iPod with the usb cord to the computer (start itunes - it could take a few minutes until itunes recognizes the iPod)
4. when the iPod is in disk mode - open your file manager (finder on mac or explorer on windows) and go to the iPod - the option to see hidden folders must be activated, then go to "iPod_control/music" (if you don't have a backup of your files - copy all subfolders to your computers hard drive).
5. delete all subfolders on the iPod's hard drive
6. eject the iPod in itunes and unplug it from the computer
7. reconnect it to the computer and the iPod should now be recognized from itunes, select the device and restore it (this will take a while)
8. when itunes is done - only sync small chunks of your music (something like 1 or 2gb are enough), check every time if the iPod works - sometimes the artwork is the problem, sometimes bad encoded mp3's - but many times it's the massive amount of music that gets hammered into the iPod at once

i hope that this would help you to fix the problem