AVerMedia AVerTV DVB-T 771 (A771)
I have this card working fine, under 184.108.40.206 (custom compiled). These are the modules I compiled: all options under "I2C", all options under "Video for Linux" (incl. "DVB", obviously).
The card also works under 2.6.13-rc7. It will probably work with 2.6.12 also, although some folks have had to disable ACPI at boot time.
To get the card to work simply call "modprobe dvb_bt8xx". Then run, "scan" (from dvb apps) or MythTV as normal.