Although most of the CalendarServer installs automagically (thanx to the brillant work of the authors), I made an install script for Ubuntu (tested on edgy). Should also work on Debian Stable. I prefer to install some precompiled packages because of it's dependencies, especially python-openssl.
With the inclusion of /bin/bash in ./run and bin/caldavd no patches are needed anymore. Still I didn't do any more tests.