With the launch of Freeview, I've decided to upgrade my TV capture setup.
Thanks to David Zanetti's in-depth information at pvr.geek.nz, and the always up-to-the-minute information from Steven Ellis on the mythtvnz mailing list, I found out everything I needed to know. And, as you've come to expect, processed it into an easy-to-replicate format, and wrote it up: Freeview MythTV setup. I'm running Ubuntu Edgy, and other than some DVB test utilities I chose to play with, didn't have to install anything - a complete "out of the box" experience.
I'm enjoying watching Stargate SG-1 on the TVNZ widescreen test channel. Unfortunately, I'm going to have to plug the aerial back into Sky eventually.
Next step, moving the card into my server, retiring the dedicated MythTV machine, and setting up XBMC's MythTV scripts.