It looks to me like a good place to put this info is
in the "user
notes" attached to the ALSA sound card matrix:
There is also a WIKI for ALSA soundcard HOWTOs at
http://alsa.opensrc.org/index.php?page=AlsaOpensrcOrg but it looks
to me like it is less active recently.
Both of these are out of date. I tried to submit updates to the ALSA
matrix, but it appears to be unmaintained. The SuSE hardware database
is no better - I was surprised to see this was also out of date,
given that SuSE is offering a commercial distribution based on ALSA.
I'm afraid it doesn't reflect very well on the LAU community that all
these docs are out of date. I know it's a boring job, but it's so
important to have reliable hardware compatibility information. Is
there no way we could combine the best parts of the matrix and the
wiki to make a new, definitive and official document?
Cheers
Daniel