Hello and welcome. I was online tonight and would guess that there were at least 500 people showing in the list of servers available to me. Some of the servers hosting games could handle 50 players, the majority were around 32 players and there appeared to be alot that ran 12 or less (likely pc hosting games).
Everything from full maps, to space battles, hero battles, CTF, Assault... if you are thinking of getting this for the PC, I would definately recomend it.
Hope that helps.