I'm one of the new happy N900 users, and after I've tried lots of features and applications, I've found than miss some.
Apps Wishlist:
1. Last.fm player (Canola is not a good one at all)
2. Google Earth/Maps with integrated Latitude
3. Good set of apps for MS Office files (doc/xls/ppt)
4. Google Mail Plugin (not web based)
5. Google Applications Plugin (integration)
6. Lotus Notes/Domino support
Features:
1. MMS Support
2. 3G Video Calls
3. Improved Mail For Exchange and for IMAP
4. More Profiles
5. Individual Ring Tones for Contacts
6. Better WiFi flexibility (e.g. 30mW-50mW-70mW modes)
7. Cisco VPN Services Integration
8. More Portrait Apps (e.g. PDF reader)
9. Increased Power of FM Transmitter (build in, not by e.g. 118 command)
10. Improved Power Management
11. HDR shooting mode support in camera
12. Improved File Manager
* Better Facebook monitor // the Cliq has this down
* Bring options back to apps like xTerm, OMWeather, Xournal, etc.
* Something like scroll-bars for long lists
* Bubble Level
* Applications install in the background
