I use Golfshot GPS on my 64gb 3g ipad, and wanted something that would allow me to attach the iPad to my pushcart.
I started with a simple stand made of three sided boxed aluminum that you can get at Home Depot in the door section, cut it with a small cordless hacksaw. The hacksaw with miter box does a shoddy job on angles so version 1 looks rough around the edges. I used copper pipe and rivets for all connections. I also used some aluminum flat stock to attach my pieces together.
The iPad overheated after about 10 holes and needed to be shut down and cooled for a while. I believe direct sunlight was the culprit.
I headed back to the drawing board and came up with Version 2. This one is made of one piece of boxed aluminum c channel, folded at the corners to minimize rivets bracing. This time I used my 12" Milwaukee miter saw with a non-ferrous metal blade.
I attached a Volkswagen solar charger to a small computer fan sucking the hot air from the back of the iPad.
I have not been able to hit the links yet, but should get out there soon and I will report back on my experiences.