If you want to be one of the first users with a Blackberry phone to use Hello! Messenger, you can participate in our Beta trials by downloading the Hello! messenger application at:
We are ironing out that last few problems experienced by a minority of users and hope to release the full version very soon. Please ensure you send us your logs if you have problems so we can make the application as perfect as possible!
UPDATE: Hello! Messenger for Blackberry has now been officially released and can be found here: http://hellomessenger.com/get-hello/