The SU-8W was so poorly supported on the N810 that it was almost unusable. I believe it was a driver issue and not the keyboard itself. The bug was reported by a number of users and a fix was promised in Fremantle. I'd want to verify it works before dumping $100 on an unusable keyboard. The fact that you need a hack to use the keyboard isn't very promising. Also that keyboard has special function keys for Nokia phones which weren't supported on the N810. I love my N810 but the whole bluetooth keyboard thing was a major disappointment. I've ordered a small USB keyboard to use with the N810 but am unsure if that option is really available on the N900.