Symbian Series 60, Nokia e61i.
However, I have had an N800 and an N810 for the last (almost) 3 years.
Funny, I have carried both my e61i and the Maemo device since Jan. 2007, and throughout that time, I used the Maemo device more than 90% of the time, even though it was not a phone.
Am happy camper with my N900.