i dont actually have one of these fancy pants recording machines but. most people seem to stick them right on the front of their helmet. I'd say stick it on the front of your board though, that would be more fun, well maybe.
Mounted mine on top of my helmet. Cut tiny holes in the mesh venting on top of my RED Hi-Fi, and used the dual strap attachment thing they give you and clamped it down. Ive ridden with it now several days and its never moved.
'09 151 Never Summer SL-R
'10 K2 T1 DB Bots
'09 Burton Cartel Bindings