Well the official N-Gage client hasn't been launched yet but the First Access Preview Service has. The service has a whole set of social gaming tools like chat and such (sorta like the Steam client). The only thing is the client is so far limited to the N81s only so if you're an N81 user, you'll be getting a really small social circle and limited game demos.
Of course Nokia says that the service will evolve as it draws near to the full scale release of the N-Gage client so don't fret and be happy that you get to play around with some new service from Nokia before the official launch. The data on the service will be reseted once it is officially launched so don't be attached to your high scores too much.
