Never heard of ChiWalking/Running. I looked it up and it seems to be the same idea as the video I posted from the Natural Running Center - http://www.youtube.com/watch?feature=player_embedded&v=zSIDRHUWlVo
Now that I've learned the benefits of a forefoot strike while running, I've adapted my walking gait by putting most of my weight on my midfoot instead of my heel. My heel still strikes the ground first, but it lightly rolls my foot forward to have full contact with the ground, and then I put my weight on my midfoot. Not sure if there's any benefit there, but I like it. I have yet to adapt it to hiking.
This is why I think there's a good correlation between walking/hiking form and correct use of poles with straps. Both forms, used correctly, should (in theory) help someone like me who is young but has a propensity to get inflammation in my knees if I'm not careful.
Pete's Pole Page - http://www.personal.dundee.ac.uk/~pjclinch/poles.htm - has some invaluable advice on strengthening your knee muscles to avoid injury on the bottom of page 1. I overlooked this on my last hike and didn't do any training. So I think the trifecta that I need to adhere to is 1) strengthen my knees (and arms), 2) use my poles/straps correctly, and 3) don't hike downhill with a heavy heel.