We also have a digital S/Pdif input header which can be used for digital input for CD players, MD players and the like.  We also see the DID EXT Pin header which is for the new Titanium drive bays offered from Auzentech.

From the top of the PCI-E bracket we have the HDMI input, HDMI output, S/Pdif output, the headphone amplifier output and the breakout cable.  The breakout cable will be handy for people using just HDMI no need to have all the extra outputs just remove the cable.