Found this @ Trillian, and this is what they had to tell about the upcoming version: We have been working hard these past few months on the latest version of Trillian, which represents another strong leap forward in usability, features, and general coolness. :) Click on Read More... for more information and a link to sign-up.
They also said: We are looking for "a few good nerds" to help us beta test. Our existing beta team has been too disorganized as of late, so we wanted to open the doors to the general public again. Old beta testers are welcome to re-apply, of course! If you've got some spare time and would like to help out, please click here to apply for beta testing.