Mitch's Crazy Office
Updated Dec 2014. I'm now running just one main system -- the 2013 Mac Pro (6 core, 64 GB of RAM, 1 TB + 24 TB RAID in the closet, connected via a looooong Thunderbolt cable). I have a few laptops and a Dell ESXi box that you can see in the closet picture. There are a pair of Mac Minis with a bunch of storage in the basement. But all the fun happens on the Mac Pro.
Check out my current project: Bit Lasso
-- the best way to search slides.
Enjoy. And if you have built a cool space, feel free to send me some links to check out.