This looks very interesting, but the it's a bit difficult to figure out what it actually is from the website. My impression is that it's like a more featureful take on Unison ("two-way rsync" iirc) with a central server to facilitate NAT traversal. I suppose they probably haven't figured out their eventual pricing model, but I'd certainly pay a few bucks a month just for coordinating NAT traversal, papering over dyna…
Can anyone shed some light on that? Thanks.