Facebook and Skype are the two things I have hardly touched in the N900 (facebook uninstalled since I don't have facebook). Skype is good, but I just have to admit that among the people I know hardly noone was ever available for calls.
But I see your point anyway. The N900 starts to float on an island of its own, even if it still is the coolest phone ever made up to date. I don't like any of the droids, not even the SGS III. The transformer prime pad I bought was boring and using ANY ssh client from any droid is just substandard crap. In the n900, things are for real.

I am just hoping for Jolla to get in business and show us people something new beside all these dumbed down sandboxed junk out there.