I simply installed it and selected the 30 day trial. and now I can play all kinds of music! very nice. (using the applications manager)

I didn't really understand how it works at first, I never gave signed up for anything. So I looked at the user account settings.
And it seems that my user account is my "N800 Wifi MAC adress@nokia.com"

I think it works really really well. What I don't understand is what is this "US only" thing? I'm from Holland and could install and run the application without any problems