Anyone remember Groove? I first saw it about 6 years ago (can it really be that long?) and I got quite excited. Our peripatetic CEO at the time got enthused because it would let him share files with all of us while he was on the road, which he was for most of the year. But then Microsoft bought the company, and our plan to use it foundered. Recently it popped its head up again in the context of Sharepoint, but I get the feeling that Microsoft has never really pushed it.
So I was quite interested when I found out about Collanos (http://www.collanos.com/), which does the same thing. Even better, it is a cross platform application, running on Windows, Mac, and Linux. I made a note of it and waited for an excuse to try it out. Finally that excuse arrived.