We had five Rakontu beta test groups, though only one saw much activity. Still, the testing period was a great success in terms of lessons learned. I've written a white paper about what I've learned; it's on the theory page.
At this time, Rakontu development has gone into hiatus and I am no longer creating or supporting beta sites. The Rakontu sandbox is also inactive. If you are interested in Rakontu, send me a note and I can show it to you. However, the Rakontu tour and screenshots are still available, and they can give you a pretty good idea of what Rakontu is like.
Groups are starting to use Rakontu in beta testing. There is room for a few more groups. Contact cfkurtz at cfkurtz.com if you want your group to be a beta test group. These groups will get careful attention and help, but must agree to give voluble feedback and bug reports!
There is now a live Rakontu people can try at the Rakontu Sandbox. Come and try it!
(NOTE: As of June 2010 the sandbox is no longer active.)