I've finally put Kaffeeklatsch in a Subversion repository, and a public one at that! Simply check out from https://layla.chrishowie.com/svn/kaffeeklatsch and build... well the build process isn't that simple, but oh well. You will need Tao, the Lua 5.0 library and development headers (check your distro's packages), and Mono. Having MonoDevelop around will make the build process a bit easier.
Happy new year, and happy visualizing!