It worked for me! I purchased an Apple Wireless Keyboard off eBay for 5.04 (!) that was missing the Z key. It was listed as being in excellent condition, a few scuffs, in working order. I figured, no problem, replacement keys are also sold on eBay for a few bucks.

Found out that the back tube had been bent over the (right side) power button. Saw this guide, and put in about a half hour GENTLY scraping away at it.

Keyboard works like a charm now! Thanks a bunch!!!