
The Comparisons table implies 2 separate NICs.
[link|http://www.cappuccinopc.com/comparisons.asp|Here]. But it's not 100% clear, IMO. I think it's rather surprising for it to have 2 built-in NICs - very few PCs have such things built-in. It may be that even though there appear to be 2 separate controllers that one is disabled when the other is active (but that's just speculation on my part). Have you tried unloading the 10/100 driver to see if the Gigabit starts working then?
The Drivers link should tell you, but it only lists Win drivers for "Cappuccino GX1 Mini PC" when I go there - not the Mocha. (I'm not very impressed with their web support.)
I'd suggest calling them to get the real story.
I hope it works out well for you. It looks like a nice toy. :-)
Cheers,
Scott.