RIM has released Yahoo! Messenger and Google Talk to all Blackberry users. Previously only Nextel and Rogers users could download Yahoo! Messenger. Both Instant Messenging programs leverage BlackBerry “push” technology to deliver instant messaging.
Most of the features in the regular desktop client are available on the Blackberry version, including emoticon support, contact list management, shortcuts, and even some new features like the ability to set message notification like a tone or vibrate.
To download, point your Blackberry browser to: