When I was still using my original Hero, I attached it to the end of one of those cheap collapsible aluminum poles that you can mount small cameras on. I used it somewhat effectively to take self-portrait shots in various locales (but you'd always note an arm going off-frame in most photos or the pole itself

)
When I upgraded to the Hero2, I read about how the use of the somewhat larger Hero in a housing equipped with a small flat lens could lead to cracking. I used this as an impetus to DIY my own tray and arms. I had an old camera housing which I salvaged the port from:
Then I scrounged up an old reel which donated parts for a goodman handle:
Threw them all together along with some cheapo gorilla-pod arms and old lights which I put some Cree XML-T6 modules in:
End result is a lens wherein I can opt to mount macro lenses and such. And all at a nominal cash-outlay - basically just for the light modules because everything else I used was in my junk bin