Requirements: be in Debian Sarge, have minimal dependencies that aren't already on server

Pluses: Python, no SQL backend, easy setup, full-featured email support, scripting hooks Minuses:

                    language    db          ui       email     hooks    comments
bugzilla            perl        mysql
roundup             python      sqlite?
request-tracker     perl        mysql/pg                                lots of extra dependencies
mantis              php         mysql
debbugs             perl        none
jitterbug           c           none