Board looks nice, question though.  I know for most of us running these thumbs it likely won't matter much as they'll be vertically mounted and fan cooled, but why are the heatsinks on the NF1 and the ASICMiner thumbs on the bottom?  I understand why they aren't on the chip itself, but it seems weird to me that with heat prone to rising, the design has the heatsinks below the thing that they cooling.  It's been bugging me since I bought my first BE and plugged it in seemingly upside down to a USB port on my laptop before eventually moving it to a hub (and Pi) after getting it a brother.  Anyway, just a question from a curious person with no more money to buy cool looking products