I was at CES this past weekend, and I made sure to stop by the Liquid Image booth and check these out. I think there's a lot of potential in the concept of video goggles, but I wouldn't want to wear these while jumping for a couple of reasons. Councilman is right that the peripheral vision isn't very good - the goggles are fairly large and have a lot of padding, which blocks much of your field of view. Maybe this isn't a problem with other extreme sports, but personally I like to have a wider field of vision while jumping than these goggles allow. Along these same lines, the goggles are just overall larger than I would like, and it seemed likely that they wouldn't even fit with a lot of helmets. The structure of the goggles (frame, padding, etc.) just seemed larger than necessary to me. I asked the girl at the Liquid Image booth if there were plans to make a sleeker model without as much goggle structure, but she wasn't able to give me much info on their future plans.
On the plus side, the goggles are very light (despite being large), the camera buttons are easy to operate, and the video quality looked good. I think if they focused on a model designed for skydivers they could probably make something worth buying (at least for newbie videographers). I told this to the Liquid Image people at CES, so hopefully the message gets back to the engineers.