anyone look into the chips on these?
I believe it's an ALC272 chip. After looking through the datasheets, it has 2 SPDIF outs and also a pair of headphone amps designed to drive headphones without DC blocking capacitors.
Looks cool. I'm thinking about pulling out these pins into 4 of the unused pins of the ethernet jack and making a custom dongle to output SPDIF and a custom headphone out.
the datasheet is here at the bottom of the page: