open air case/frame
I've been looking into building a system with 6-8 7970 cards. Obviously cooling, power, and room will be an issue, so I think an open air case is the best way to go.

I've seen several pictures of people who have built neat little frames to screw in the video cards, but I haven't seen much discussion on where to buy (or how to make) such a frame. Any recommendations?
A pretty good DIY GUIDE is posted here:

If you not wanting to DIY you can check the site of Rich Chomiczewski he has some nice frames:
This is exactly what I was looking for. Thanks!