Sounds great - I've got a national parks web site that I'm planning to re-launch in the near future, it would make a great feature to add. What I don't have is

Sounds great - I've got a national parks web site that I'm planning to re-launch in the near future, it would make a great feature to add. What I don't have is any knowledge of is the costs of the imaging hardware you'd need - it would have to be fairly ruggedized to deal with the trail dust or if the backpacker fell. I don't know if consumer-grade video cameras that mountain bikers use would be good enough. I'd start with the most heavily hiked trails first, South Kaibab and Bright Angel in the Grand Canyon, Half Dome in Yosemite, South Rim in Big Bend, and so on. Luckily myself and a lot of my friends are trail runners, so I could probably get a few of them to do video trips in exchange for airfare :)