http://bungie.net/News/TopStory.aspx?story=livebythenumbers
Unique Users: 413,282
Unique Users to Date: 1,260,979
Total Sessions: 957,485
Average Min / Session: 92.47
Min Concurrent Users: 18,464
Max Concurrent Users: 104,781
Roger Wolfson helped us put those numbers into perspective with some more numbers:
Total Live-aware Games Logged to Date: 45,928,727
Total "Player-Games" (the number of times a player has played a game): 336,555,601 (that's over a third of a billion, as of January 2nd!)
Total Number of Clans: 387,793 (now you know why we only let folks be in a single Clan per Live account.)
Just to explain some of the figures above: unique users are individual Gamertagsthey do NOT include guests. That figure does contain a number of two-month trial subscriptions, however. A "session," we should explain, is basically a continuous connection to Xbox Live through Halo 2.
The numbers above are cool, not only because it means Halo 2 is doing well, but because it means the advent of mainstream broadband gaming is upon us. We'll look back at these numbers in a couple of years and say, "Wow, is that ALL?" But right now, that's a lot of players.