CodyMac,
Why not just use IM+ for your BB? IM+ has MSN, Yahoo, ICQ, Jabber & AIM. I use 3 of the 5 myself and it works pretty good for being a mobile application. You can get this application at
http://www.handango.com and can get more information about the application at
http://www.shapeservices.com . I hope this helps.