I am in the planning/preparation stages for my custom case. Dimensions will be 19"Hx22"Dx15"W, housing 2 complete watercooling loops with 2 77 b'ville heater cores, 2 pumps, etc... I will be using 1/4"x1" aluminum bar for the frame, 1/8" aluminum sheet for the MB tray, and 1/4" acrylic 2-way mirror for the sides. This will make the case transparent from the outside when the cc are on, but because the inside will be mirrored, it will reflect everything (infinitely in some places)!
I hope to have the frame and main panels done early next month, so I'll post some pics.