Build yesterday 
Hmm very nice idea... does it work well to isolate the card that way?
I imagine so since it would create a windtunnel-like effect but it would be nice to make sure.
From my preliminary tests it seem to work very well
with a 5850 @ 1000/900 1,21 Vcore and 60-70% fan i was able to keep it around 71 degrees too bad the VRMs are more or less cooking (135 degrees), i checked all the screws on the back of the board today tough and one of them was a bit loose so that might have been the problem with the VRMs, i'll check later