Fantastic article, valuable information!
Thanks for posting a great tutorial. This is the best one I've seen because of your straight forwardness and simplicity in describing form and technique.
I started power cleaning 6 years ago with really crappy form (think of an explosive reverse curl... Yikes). I gradually cleaned up my technique by watching training vids of oly lifters. I just learned proper triple extension 2 years ago, and my technique is still nowhere near perfect. Then there's conflicting information because of the recent popularity of oly lifts (I think the crossfit explosion had a lot to do with this). I was actually confused when I watched Rippetoe teach the power clean and thought I had to deprogram myself and relearn it. Ultimately, I stopped doing the lift for a year because the gym I was at changed their policy to not allow PCs and other oly lifts.
I recently built up my garage gym complete with a proper oly bar and a set of bumpers and now incorporating power cleans with a vengeance. I've picked up a bunch of useful tips here regarding technique, frequency and workout programming. Keep up the good work man, I'll be keeping a close eye on this thread :)