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What I'm really interested in is video chat. It doesn't look like it's on Fluendo's to-do list, but given all the GPL code here, it shouldn't be too hard to put something together.
When I can buy a $100 Firewire camera, plug it in, and start chatting with somebody, I'm going to be incredibly happy. And I don't think that day is too far off...
(Yes, I know there's GnomeMeeting, but that's not terribly cross-platform, from what I've seen. I don't think you can chat between Linux and a Mac with that.)