I stuck it on my 900 as a trial and my initial reaction is pretty good.

It doesn't look too good though and I want to cut the top half of say a 1000 off and insert it where the touchscreen was. Not sure how feasible that is and how the circuitry is integrated in the guts of it. Not sure how to make the light button still work after that.

Power is the other problem and iPods eat power up quickly. I'd liked to run a cable through it and just be left with a USB header to attach to at the bottom.