Wow, thanks to all for all the good feedback and suggestions I got about the v4l-dvb driver package. If you are still looking for a nice and feature-rich frontend, you can take a look at the newer vdr packages for Ubuntu.
Hanno, maybe you are interested in maintaining these packages directly in Ubuntu, together with the MOTUs? Then intrepid will always have up to date packages, and it is no problem to backport them to stable releases, 8.04 at least. Then more users could benefit from them, and you’d get more testing from Intrepid users, too.