Dennis said:All Blackberries have various AIM/MSN/Yahoo/ICQ programs. Some are free, some are not. For AIM, there is a free program called Ramble (http://wireless.sra.com/ramble) that can be downloaded and used on the Blackberry. I've been using it for several months now. For some other Blackberries, AIM/Yahoo/MSN/ICQ is included, but you have to pay extra because every "message" you send is really an SMS and you have to pay extra for SMSes.
Google Talk is free and downloadable from Google.
