Trillian Astra 4.2 Beta, is the next phase in Cerulean Studio’s progress towards a better Instant Messaging client.
Cerulean Studio’s is also (for a limited time only) offering their Premium subscription for $10 (original price $25). This subscription will last you the entire 4.x builds. When 5.x comes along it will only cost you $10 to upgrade or you can stick with Trillian 4.x.