I think Yahoo Messenger is the best as its used by most of people in the world.
- Digital -
MSN WINDOWS LIVE MESSENGER IS THE BEST
I really like MSN the most as most people I know use this messenger, I've had Yahoo messenger for a while but it only caused me problems
I use MEEBO, no need to download any kind of software because it's a web based (all-in-one) messenger and I'm always logged in MSN, YAHOO, GTALK, AIM, MYSPACE, ICQ, FACEBOOK at the same time.
Obviously yahoo messenger, None other can come near to yahoo in messenger i guess. .
Having lots of options and it's prettyyyy cool
I think,yahoo is the best instant messenger!