Been anticipating this. I have a server running on my little HP home server and I'd have to say that this is pretty spiffy. What sold me was 3D user audio positioning and the file transfers.
I think the audio positioning is kind of weak as even the test sound required me to turn up my speaker volume to hear it in the rear speakers. TONS of potential in that one, though. Also, I was totally not anticipating that file transfer meant hosting files on said server instead of going user to user.