The BlackBerry Beta Zone is running an open beta for all members to try the latest versions of the first party instant messaging services. It seems all the betas are maintenance releases which means it’s not all that exciting to get involved.
In general, RIM could do a lot better with these IM clients and get far more creative. For example, why make each app separate? Each of these applications could be built into BlackBerry Messenger to create single uber-messenger client.
(Thanks for the tip Mike)