Use Google Talk and Add all your MSN contacts through a jabber...
this is soo handy, only one chat client for all your chatting...on Blackberry and on Computer!
And it's almost INSTANT....
The directions I used
http://www.bigblueball.com/forums/go...msn-yahoo.html
The BlackBerry Forums Thread on this
http://www.blackberryforums.com/show...alk+msn+jabber