Still no clues to how it does audio
has scored a couple of pictures of the DVI to HDMI dongle that will ship will all new ATI 2x00 series graphics cards. It looks just like any other DVI to HDMI dongle, although it apparently supports HDCP as long as the card does.
However, there are no clue to how the audio signals are ported to the HDMI dongle, since as far as we know, DVI doesn't support audio.
You can take a look at the pictures over here