I looked into and pre-ordered one of these last year...never showed...the dealer I went through didn't receive them and refunded my $.
Water proof is available..
http://shop.helmetcameracentral.com/HC-VIO-POV100.html
VIO POV.1
Spendier, but higher quality video, longer battery run time, uses common style batteries (AA) thus, easy to have spares on hand.
Does have a wire from cam to unit...but I think in the end, this setup is worth while. Keep your batteries warm in the pack, for longer run times. And somewhat safer in a crash?
Wireless remote to start/stop/standby.
Mic can be tucked into your pack for less "wind noise", and isolation.
OH, and it is waterPROOF (submergeable) in up to 2? 3? 4? feet of water (cam and unit).
After twenty/20 failed to come through last season, i really started researching helmet cams (mostly looking for all in one units)..
Vholdr is still definately still 'up there' for a cheaper (or midrange), more middle of the road (and ALL IN ONE) setup..
Vholdr definately has "simplicity" down..install mount, slide cam into place, turn on....ride...done, gtg (for the most part).
Some people may be fine w/ a cheaper, 150$ all in one unit too..
I'm hoping to pick up the POV1 for this season..The footage and reviews prove it for me.