The dual chipped 3870X2 presents some obstacles for those of us into extreme cooling.
Pictured below is my home made/semi-ghetto solution for mounting my two 'kayl' GPU pots onto the beast for some cooling action this long weekend.

Made from 3mm aluminium panel, left over from a case window mod (thanks Gary @ Uvnium).
All was made bare handed using garden variety hand tools and power tools.

Right now im typing on the system with no LN2, just to check mounting and it is really nice.
GPU's are idling at 40C and only very very slowly creeping up.