I've said this before I suspect, but of all the products I've worked on VisionFS is the one I'm proudest of. It was a small but great team of people, all pulling in the same direction, with sufficient autonomy - whether official or unofficial - to do the Right Thing. It was also, mostly, fun.
For me there were a number of firsts. It was the first product I was involved with from such an early stage in development (thanks to Roger, I'm sure). It was the first product on which I had a great say in the doc deliverables. It was the first full-length printed manual that I wrote. It was the first complete UI that I designed. It was the first project on which I felt part of the team, rather than being the person doing doc for whatever the team produced.
There's a lot more I could write about VisionFS, and I might do so once I've had a chance to look through my extensive archive.