This includes people who are available, idle and away. Not including bots.
For me, 31.
I only use AIM and only 8 of my friends are online.
Does the chat count?
Technically I could IM any of them if I wanted to...
...which I don't.
anyway that's +26 with chat.
6, if you un-condensed all the same people...
9
26.
lol AIM
16
Yahoo Messenger.
11/69
I don't use any of the three for chatting. If I have the need to talk to someone, I either call them or meet up with them somewhere. There is the occasion I use one of the three, but hardly.
6 on MSN.
27 on AIM.
My connection keeps dying, so I can't really tell.