Cerulean Studios had announced that they are working on Trillian for BlackBerry. A new version is now available for public beta testing!
Trillian for BlackBerry is currently in beta testing. The beta is time-limited and will expire upon the final release of the product.
To install Trillian directly to your BlackBerry using our over-the-air installer, simply visit this page using your BlackBerry's web browser: http://trillian.im/
via Trillian Blogs