...a Trillian 3 sneak preview is up on our website. (It also provides a preview of what our new website design will probably look like.) This is what's eaten me lately.
The alpha test version can be downloaded from the member page for Pro members, as well. However, keep in mind it's an /alpha release/, and therefore there are still bugs. (It's stable enough that we and our core tester group all use it for our day-to-day IM, obviously, but there are still a few wrinkles to work out.) There are already a few reviews of the alpha floating around out there, no less. The Free version (Trillian Basic) should be out at the same time the new Pro one is finalized; it's been in beta-testing with a few folks for a while.