[Updated: 11/10/10 at 6:05 PM] See post above for more info.
AirPrint sharing to Mac OS X 10.6.5 does not work with the version released today by Apple and the iOS 4.2 gold master build.
I guess Steve Jobs really expects us all to buy expensive P.O.S. HP printers.
Hat tip to MacStories.net and Federico Viticci for calling this one.