There are others (Score 3, Informative)

Here's one:

http://oap.sourceforge.net/

Here's another (warning only 128 kbps uplink):

http://gramlich.net/projects/robobricks/index.html

It sure would be nice if people who start these projects would shoot a message off to the comp.robotics.misc news group to try and minimize overlap. The current state of affairs is that there are plenty of projects and very little of the hardware from the projects is interoperable.

-Wayne

Disclaimer: The last URL is mine and I started it back in 1998.