Ermm.. you noticed that article came out Dec 2006?
It looks cool, but although they say you can ride uphill, all the videos have them riding downhill. If i had $400 to burn, I might buy one just for the hell of turning up at work when no-one else does but those with high lift kits on their awd.
I do have a problem with a company that can put this on their website.
"Ktrack is a universal tracted rear drive kit"