Well, in a previous blog post on the ZOG blog I noted the Behringer UCA-202 USB sound card works fine with Linux and has quite good sound for the price point. After using it for a while quite happily, I got curious and opened it up to see what is inside. Essentially, not a lot but you can see the guts of the system is pretty much the Burr Brown PCM2902E chip.
Top of the board:
Bottom of the board: