It’s the successor of the N770/N800/N810 series of Maemo driven internet tablets, of which I own the latter one. It’s a phantastic device, though the internal GPSr only works if the tablet is placed upright, the camera just sucks, it lacks RAM, the internal mass storage is not sufficient and it only provides WIFI connectivity.
There are several further impressive new features, including an officially supported port of QT4, making it the number one completely open mobile computer which you can program to your very own likings. And the best of all is that osm2go already is ported to Maemo 5 (aka Fremantle).
It seems the N900 addresses all of those issues, putting the device immediately on top of the christmas wish list. The only grain of salt is the price tag. I’m curious if I will find a telco who offers the device in cojunction with a decent contract.
So I’m desperately waiting the device to appear on the market and the products that telcos will build around it.