It's a brand new PPC model for Google Local. For example...If you do a search for "booksellers nyc" you will see Barnes & Noble. The GeoAd is the little coffee cup icon on the map. Click on that, and another box appears. If you click on the url, the advertiser gets charged a cpc.
Large advertisers can send Google a data feed, and then run a PPC campaign on Google Local. Is anyone doing this yet?