iPod 4GB Nano

My recent buy is iPod Nano was a gift to my brother in law. I was under this impression that it will be like the old nano. But it took me by surprise.

1. It's unbelievably sleek
2. iPod's new classic two paged interface. Super cool
3. Quality of sound that everyone knows of
4. Radio - people in metros rely a lot on radio

What I need to find out is how many accessories are available. Also, he can load iPod linux and check how games work. I was not really impressed with 4GB. I would expect to see atleast around 8GB if I am giving 8.5k.