Just get an Android 2.2 phone.

See what's coming in the videos doing the rounds (the public announcements of upcoming functionality is something Nokia would be wise to copy). Looks nice.

Not only will it work just fine but you'll be supported for several more updates (not something I can hand-on-heart say is true on either count where the N900 is concerned).

The Nokia approach to Maemo/MeeGo and mobile devices is now such a mess that I can't genuinely recommend it to anyone unless you enjoy a world of pain and are prepared to wait for fixes to your bugs in the next device, only to be disappointed when it finally arrives.