Oms said:The new nano has a stronger, more durable case.
The screen is brighter than before.
The battery life is basically double what it used to be.
I'd say it's a lot better.
Rich said:I have a 20gb 4th Gen one aswell and just updated to the nano, due to the fact it is tiny and still gives you 8gb of space so is ideal in the car, no moving hard drive parts means no chance of skipping, and easily fits in a pocket.
Just use my normal ipod at work now.