My main question, is Ultralock only available when utilizing AES format or does it also work its magic on S/PDIF?  The manual appears to read that this is so, but it is does not clearly distinguish this in the features bullet list with paranthesis, so I have to ask.

Also, on a more curious note, why isn't the word "upsampling" more prevalent in the DAC1's marketing?  Upsampling is used on DVD players and the quality an upsampled standard format DVD can produce is truly amazing...all of the digital noise/artifacts disappear in much the same was as the DAC1 makes happen with audio (though I am not sure if the method is the same logically/electronically).  In fact, upsampled DVDs look so good there is almost no point in buying Blue-ray until it becomes standard.  Why aren't you guys throwing this word around left and right?  I mean upsampling 24-bit/192khz is pretty impressive!