Trillian is this neat multi-network chat client for Windows. Unfortunately it suffers from really long development cycles. In fact the latest version was released way back in December of 2004.
Whelp there’s some new screenshots and a teaser site up for the next version, Trillian Astra.
It’s got a fresh new interface (but is still totally skinnable) and some kind of weirdo MySpace messaging integration.
Still no word on availability, but if history is any indication I’d bet we’ll see it released in about a year!