Free GoogleTalk for the Blackberry

Google talk to the Blackberry - Google Freeware

You can run GoogleTalk on your Blackberry mobile phone. Simply download the software and configure using your Gmail account.

Has anyone had a chance to try this on their Blackberry yet?

BlackBerry - BlackBerry Press Releases

Google Talk for BlackBerry, a version of the instant messaging application specifically designed for BlackBerry handsets, will allow users to send and receive instant text messages with other members of the Google Talk community, while on the go. Google Talk for BlackBerry extends the user experience of the popular desktop-based Google Talk instant messaging service to BlackBerry devices, allowing users to add, delete and rename contacts, know when their Friends are online and available, leave conversations and resume them later, copy conversation text into memory and even be notified when a message is being typed.

Google Talk for BlackBerry is easy and intuitive to use. After downloading Google Talk for BlackBerry, users can quickly sign in through their Gmail™ username and password, access their existing Google Talk contact lists, see which Google Talk Friends are online, and send and receive instant messages. The service is integrated with BlackBerry to allow for home screen notifications of new messages, integration of Google Talk instant messages in the BlackBerry Email™ inbox and quick access to the BlackBerry Calendar™ from Google Talk for meeting scheduling.

Use of Google Talk requires a Gmail account which can be obtained when invited by another Gmail user or by visiting https://www.google.com/accounts/SmsMailSignup1. Google Talk users may invite other Gmail users to their contact lists directly from their BlackBerry handset, just as they would from a PC.