The Chicago Sun-Times is reporting that Motorola has just filed a patent on what has got to be the ultimate pay-per-click mechanism: beaming advertisements to celphones and then using geolocation to track when the celphone user has walked into an advertised merchant’s store, at which point the advertiser will be charged for the “click”.

It’s three-dimensional AdWords!

Now, if I can run up to you on the street, show you the advertisment which has just arrived at my celphone, and then get paid when you walk into the advertised merchant’s place of business, the cycle will be complete.