Hi,
I just found this : http://www.openmusiclabs.com/projects/codec-shield/
Apparently the latest revision of the Pi has GPIO pins specifically for I²S (http://www.raspberrypi.org/archives/1929 , see Additional I/O expansion).
Though i can't find anything on the web right now, it should be possible to connect this codec to the Pi, what do you think ?
I m very excited but i reckon I have a lot to learn...
Cheers,
Pierre.