Map-vertising...

Here's a little idea for the Map wizards that are Google Maps.

Google have photographed all of the streets of London so you can navigate in Google Street view...
Along these roads you will see 48 sheet billboards, Bus stop adshels & various other advertising canvases.

Why not sell this as a 'digital advertising space?'

I'm not sure of the legalities, but generally if you've taken a photo you own the rights to said shot, surely it's up to Google what they put in their 'photos'... or is it?

Take this Powerade billboard at London Bridge for example... Naturally, advertising space expires with time, but when Google Maps logged all of the street view shots Powerade was occupying the space and as a result has become timeless. Surely, Google has the power to replace these spaces with whatever they like - or is it up to the Media space owners like JC Decaux or Clear Channel to keep them updated?

I'm not sure of the numbers here but I'd guess thousands of people glimpse at street view everyday... It's probably worth a shout. Maybe you could buy the space on the most visited route on Street View or something...