Great idea. I tried installing on 10.4.11. If I run the server from the command line with open -a, I get the following error:
open -a /Applications/CalServer.app/ net.pflaeging.xc2ical.config
2009-04-08 07:03:50.378 open[4377] CFLog (0):
CFPropertyListCreateFromXMLData(): plist parse failed; the data is not proper UTF-8. The file name for this data could be...