I found this picture on Flickr though Technorati and I can only describe it with one word: Interesting!
Especially beause many people claim, and even IT media iformation sources do, that MSN is the strongest IM client.
But as this graphic shows, however, the biggest is indeed ICQ! 😀
ICQ Community rulez! 😀
PS: DO not know wether MSN and Hotmail were the same time available but I see it the way that most Hotmail users have MSN.