Tom Keating picked up on the recent Nimbuzz Mac client announcement which I missed last week.
I suspect that we'll see a lot more in the area of softphones, especially on the Mac. To date most softphones have been designed for PCs and then ported. In the next few months we'll likely see some native Mac apps that change the whole game.
Hat Tip to Nadeem at About.com's VoIP blog as he pointed me to an update of VoxOx to 2.0.
In essence VoxOx and Nimbuzz are on collision courses, seeking to be the aggregator of Instant Messaging. The funny thing is that Gizmo5 (when it was simply Gizmo) had all that going and more. Right now Gizmo remains the proven SIP player in the space, but others seem to be catching up.