{mosimage}This morning I was on the train and my iPod nano (2nd Gen) locked up when trying to play a podcast. Not being near a browser, there wasn't anything I could do, but here's what you need to do in order to reset it:-

1. Toggle the "Hold" switch On, then Off again.
   
2. Press and hold down the Menu and Center buttons for several seconds.
   
3. The unit should reset to factory defaults.