HandBrake is a handy open source free application for converting video from DVD to MPEG. Part of what makes this program great is that it will handle so called encrypted movies (provided they are utilizing CSS). Plus, it works on Linux, Mac, and Windows. I won’t go into great detail about this project, but its worth a try.
If someone has some free time, please convert this into a DEB and get it into Ubuntu/Debian repos. Its promising but useless for a lot of users if its stuck as a Tarball.