list of apps I would like to see:

Calibre - Awesome multi platform Book Reader or mobipocket
Xbox Friends (hated everyone had this and no matter how much I searched couldnt find it for the iphone
Mobbler or other last.fm client
A decent online fps
Typing of the dead (dont think this has ever been ported to linux but would be awesome on the n900)

Also question has prob been asked elsewhere but is porting wine over possible? Could see screen size being an issue but this would open all kinds of other awesome!