This card is quite popular in Australia and operates well with MythTV. In ubuntu 8.04 the module detects and loads automagicly however in previous versions a little work was required below is the procedure i used in the past.
It is supported by stock kernels of 2.6.9 or later.
The only command necessary to get the card to work is:
/sbin/modprobe dvb-bt8xx
or simply place
dvb-bt8xx
in the /etc/modules list for it to load at bootime
then the system will registar the device under /dev/dvb/