Trillian Pro 1.0 has been released. It's a commercial version of Trillian, 'the little instant message app that could'. The 'pro' version is $25 a year and in my opinion, well worth it. There is still a free version-- version 0.74 has also been released.
The 'pro' version adds a number of bells and whistles. It now has a plugin architecture-- Cerulean has a few they released like a POP3 plugin for checking your e-mail account(s), a RSS plugin for grabbing 0.9x RSS newsfeeds. It even supports the Yahoo webcam features!