I don't think there is a way I can join in on your game in steam through the friend list is there?
I'm 99% sure that MW2 did have that capability. Right click (join game) or maybe (join server)
Black ops doesn't, and I would have liked it, but obviously it's too late now.
I liked MW2, and I probably would have stayed with it, if it weren't for the hacks that lead to long wait times to find games. . . . . . .
Love the spec ops levels, would have been great to add even 2 or 3 more players to it.