I think the n900 has most apps that any user could want I can see from all the previous posts that some people want improved apps but I cant say that any of the current apps dont fulfil the jobs that have to. However there are a few app I would like to see in the future.

1) I would like to see a ringtone maker/editor, something really simple like a bar that lets you chose the start time and end time of any track and then either save it as a new tone or make the phone start ringing from that point of that track.

2) Another App I would like to see is gnutella client. I dont know if theres any open source client for this but I know there was one for the symbianOS. (i dont know what the forums view is on p2p but its just an idea)

Some cross platform online games would also be pretty sweet, e.g a pool game