2 years ago just when POV started showing up but before it got really popular i came across a video shot at magic. I emailed the author and asked him about his camera. it was similar to the setup DHS described.
Basically he had a pen sized camera attached to his goggle strap and a cable running to the "body" of the unit in jacket pocket. i recall googling it to find out more and it was pretty much full feature on the main unit, including video display and playback.
You're probably talking about something like this:
http://www.vio-pov.com/
The last time I checked it was considerably more than a GoPro.