Soon, you could see ads in Google maps that never existed in the real world:

This patent, which was originally filed on July 7, 2008, describes a new system for promoting ads in online mapping applications. In this patent, Google describes how it plans to identify buildings, posters, signs and billboards in these images and give advertisers the ability to replace these images with more up-to-date ads. In addition, Google also seems to plan an advertising auction for unclaimed properties.

This is the kind of technology that could have some hilarious end resuts. FailBlog should do very well off this :)