The n900 in its current state is not exactly usable, unless you are a developer or a Linux Guru. It has some great pros like a superb browser, flash support, opennes.

The downsides however are numerous. There arent many applications that are practically usable, and until MeeGo is out there probably wont be. Applications coming from the community are always welcome, but a device like the n900 needs high-end apps.

Another downside is the lack of decent maps and navigation. I travel a lot and i expected the device to have at least some decent map applications. The calendar is amongst the worst i've used.

Seeing as Maemo is being left behind,and there are no updates, 1.2 has been "around the corner" ever since February, the future
for Maemo isnt very bright.

However it's still one of the better devices out of the box.