In my opinion Windows Mobile and Maemo these days are for the same group of people in my opinion. On both Windows Mobile and Maemo nothing really works until you spend a good amount of time customizing things and tinkering things. While yes Windows Mobile has a larger amount of basic phone apps and the Nokia n900 doesn't, there is no real serious support for Windows Mobile these days unless you download community apps from xda developers which there are many apps for Windows Mobile made by the community. On Maemo it is the same there are many community apps but it lacks basic apps found on Android and Symbian however the community is what keeps the Nokia n900 alive. In my opinion both oses are great for power users, hackers, homebrewers, and tinkerers. I think Windows Mobile is better choice because there is more choice of hardware and form factors and there is more support for it. I would use a Windows Mobile device as long as it is 6.5. I think Windows Mobile and Maemo were both very good ideas just poorly executed.