Lack of 3D games... we'll probably see more... but I'd want to cut my cpu some slacks
the BAT.... no idea :X
Mics?


EDGE needs a separate chip... although, it would be nice to have, I'm not opening up my iPod to install it :P
You wouldn't want to transfer songs via Wifi... Wifi is slow, USB2.0 <3
and lack of devs... well, that'll change soon enough with SDK