apologies to yahoo
Live Messenger install sucks. It sucks like a black hole.
Install Adium for mac: drag + drop, enter credentials
Install MSN for windows: run, wait 10 minutes for it to connect, tell me that it has connected, wait another ten minutes, ask me to install a bunch of stuff that I guarantee no-one actually installs, realise that even though i only selected one package it has to download 7 of them, wait 20 minutes for it to download the extra packages (we are still in the installer here), wait for it to download fonts (what is this, 2001?), then open, enter credentials and close all the extra windows that open; MSN today and all that crap.
Yahoo, you are relatively awesome.

