Trillian has gone Pro for $25. Not that we didn't see that coming. The plug-in feature of Trillian Pro 1.0 is compelling, if only because Trillian still lacks Jabber support (despite the fact that Jabber is open source). They continue to support a free version, 0.74.

I'd be much more inclined to pay for Trillian if I didn't suspect that IM providers are still intent on blocking unofficial chat clients. The Trillian developers have done a decent job of catching up with "changes" in the protocols, and supporting them with payment would certainly assist this.