all my mates use msn, so i do due to 'compatibility issues'
of course they all use msn for the same reason. Catch 22.
Until recently we all had icq too, but it is even more unstable than msn, or aol messenger or yahoo, come to think of it.
Well, msn is the only real option as we're all running Windows, i am sure there are tons of non top heavy alternatives for other OSes.
Still, as i mentioned before, i can't get my proprietary laptop screen to work using Linux so that's why i am running a crappy M$ OS. Nevermind...