In this article, Linux entrepreneur Mark Shuttleworth says, “We've started to use [Croquet] for planning and building Ubuntu.”

Linux works well. One of the hard parts with delivering on “Linux” (generically) is that there are a lot of variations. Croquet works on some combinations of kernel, libraries and device drivers, but not on others. I don't have a Linux box myself, so I haven't spent any time on it. (The Croquet Collaborative runs on FreeBSD, and does so as a graphicsless server.) It's tough to be trying to accomplish something while wrestling with configuration issues.

But Plopp offers a consumer-market product on many flavors of Linux (as well as Windows/Mac), but it doesn't (yet?) make use of the full collaborative Croquet SDK. Once it runs, it runs. I guess the Ubunto folks have got real Croquet running with their developer and business configurations, and are now starting to explore its use for doing real work.