I have this card and the radio works great, much better than with Windows. You just need to pass card=16 to the driver like so.
modprobe cx88xx card=16 audio_debug=0 tuner=2
modprobe cx8800
I have to use the tuner option because I have an NTSC card, it should work without it for PAL.
I haven't got the IRda remote to work yet though.