Oh I should of read further down on their page. . oops here is the info for people who ask:
JiveTalk key product features:

• Log in to all your existing IM accounts simultaneously: AIM®/iChat, MSN®, Yahoo!®, GoogleTalk®, ICQ®, and Jabber.
• JiveTalk uses your phone's data plan, no per message charges.
• Intuitive and user-friendly interface, adaptable for both the casual user and heavy messenger.
• Custom status messages, privacy controls, invisibility... all supported!