See the pics, the one of the back panel.
To the left side, good "line level" audio out is just like a normal stereo, see the RCA jacks, video out, and L-R audio. S-Video out connector to the left of those.
On the lower right hand corner, three circles are audio in/out connectors that are *not* on the board. By the way, the square one is a ethernet connector, but the controller chip is not there, a SMD large chip!
Those audio connectors would be like a sound card's in/out for a mic and PC speakers.
It looks like someone is working on enabling the sound in / out. Looks like all the parts are on the board except the connectors.
Go get one before they are all gone!