Google Voice is a free service from Google that enables one number access to any of the different phone numbers you use throughout the day. By distributing your single Google Voice number to contacts they always have that one number to reach you at. When they call Google Voice their call is forwarded to any of your “normal” phone numbers (business, office, cell). Behind the scenes of Google Voice you setup special rules so that business contacts only ring to a certain number during a certain time period while family might ring to another during any time period. Currently the service, operating in a closed beta, is completely free. A Patent has however just been filed that shows how Google Voice may present you with targeted advertising based on your location (as well as presumably all that it knows about your Google usage (profile). The patent is described as “A computer-implemented method, comprising:receiving an indication of a telephone call being placed from a calling number;determining an audio advertisement to play; andplaying the audio advertisement prior to a called party answering the telephone call. “

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