Thanks for all answers. I will try to seek N900 in my environment and test the experience as this device looks promising.
About Android devices... I don't like their business model so I avoid them. In my country, mobile devices market is running with this model, in which device doesn't cost much money, but is paid with user's data (e.g. for price of a new N900 I could buy 3 or 4 typical Android smartphones, not the top ones).

Muarf? I was peeking at their package list files and server was up and running.

@t-b
Pandora/Pyra? Yes, I consider it too. Larger keyboard, better CPU, Linux too... 3x more expensive than new N900.