Rob Black - the reknowned stereographer - took them out and here is a clip...
Go Pro test on Youtube
So you see - it is possible to shoot some stereo-ish 3D of reasonable quality.
If you don't have SI2k money or even Arri mini S2K moneey then at least you can get
your project moving with a pair of non synced 60fps Go Pro's.
Good luck!
http://www.youtube.com/user/robhblackrobhblack#p/a/u/1/h9Y7qO_LIrs