Irridium said:
A quick check on Steam shows that there are roughly 2,333,680 people online. Not all of those people are playing a game, but I'm willing to bet at least half are. I doubt Xbox live has that much on. And this is a Monday at 2:50 US Eastern time.
But its just a company promoting its product, so whatever.
Alas, the Steam Community page counts the number "In Game" and the figure is less impressive: about 403,000 right now.
I don't know if it excludes non-Steam games and mods, but still. There's always Battle.net to factor in (soon to incorporate the entire World of Warcraft fanbase, or at least Battle.net 2.0, with promises to implement the new version into Warcraft 3, Starcraft 1 and Diablo et al.)