On paper and with a few minutes of use, it looks pretty good. On the PC side of things, the best equivalent of Adium is Trillian (you may know Trillian from its iOS app?) Today, Trillian’s application for Macintosh has gone into Beta (the Alpha’s been floating around for a couple of months). For those chat clients outside of the realm of iChat, most of us Mac People use a great little app called Adium.