Debian/Ubuntu sympa packages rely on apache1, so one may have problems running sympa on Ubuntu Edgy, for instance.
Read how to get it working here
This simple HOWTO explains how to configure Sympa and WWS to run with Apache2 and FastCGI. FastCGI is used instead of CGI because of the performance impact it has. (Basically, CGI forks a new instance of the CGI script wheareas a FastCGI-enabled script runs as a daemon to handle requests, much like a decent system like Java Servlet API.)