The sprinkler is the ScareCrow from Contech. You can find more info at contech-inc.com and I hear they’re now available at WalMart and garden stores in addition to the usual online sources.
I originally uploaded this video in 2007 and it sat there for several months with a few dozen views from me and my friends. Suddenly it took off, getting hundreds of views. Turns out someone had stolen it from YouTube and posted it on another site that awards money for selected videos. My video had been selected and the thief would have presumably claimed the prize, but I contacted the site and provided proof that this pool is in my back yard and the video belongs to me. (It helps that I put my podcast’s URL on the video.)