Check out this new Gopro mount , this could be one for you DJ 
it's made by Sail video system. It's a refined version of the Dogmans backpack cam. $250 plus freight.
www.sailvideosystem.com/
I've been thinking about this idea for ages.. Well before Roger did his.. I have a few other ideas also.. I was very disappointed with the GoPro chest mount so I'm thinking a back mount might also have a bit too much movement to work well.. I was thinking about using an old kitesurfing waist harness but there were a few hurdles that I couldn't get over.. I'm looking forward to doing a new vid soon that will be very different.. 
DJ
Thats innovative,
If it doesn't wobble to much it might be fun for some bedroom activities with the misso.I could play the part of a giant scorpion and she could play the part of a High priestess,attracted to my giant...tail.
It would look a bit weird if I wore it at the front.She wouldn't be into that.
It needs some work.
Here's one made from a camelback, PVC, cable ties & duct tape...
Not used it for SUP yet, but have for kiting...
Even more Aussie inventions here:
www.seabreeze.com.au/Articles/Kitesurfing/Filming-kitesurfing-over-your-shoulder-with-a-GoPro-HD_4602204.aspx
There is one made for sailboarders that fits on the harness my mate has been using his for a year now I think it cost him 100 so 250 is kinda dear don't u reckon?
im about to invent the new Gopro with
retina vision by Weiry
just a little more duct tape, pvc and superglue
F*** that superglue stings
I made over a year ago this one.
Still have to try it with SUP.
and yes, that white stuff on the garden table is what you guys sometimes read about, ,its called snow.
doesnt stop us from wavesailing and SUP although the other frozen version (ICE) does slow you down a bit.
(last weekend in the canals of Haarlem-Netherlands)
lh5.googleusercontent.com/-nE1tzzqkvJo/UVf1i7n_p3I/AAAAAAAAK6c/NY_EfYYMlTQ/s597/%5BUNSET%5D
lh3.googleusercontent.com/-hDuwKmVEnRM/UVf1jmzCSOI/AAAAAAAAK6g/EAP7tNJJxlk/s597/%5BUNSET%5D
I did a 12km tour and there was only a couple of hunder meters that where not frozen (yes there where i checked if i could paddle and started a bit too optimistic).
The Ice was everything from slushpuppy to a tiny little film till too thick so paddle around and find a course.
you should put a how to guide up I reckon quite a few people would take the opportunity to build one.
