yes, i see it now. The amp card has a PCIe-X4 connector about halfway down, and the DIVA mainboard has a matching slot for it. No doubt that's how they feed in the audio channels.
That's a really cool board. Expensive for a mainboard, but it depends on what the amp card and on-board video w/hdmi and component out are worth to you. It's got sideport memory too, that makes it the fastest on-board video you can get. Nice.