jomaxx - 8:28 pm on Mar 7, 2008 (gmt 0)

Street level. Street level. Photographs are taken at street level, in fact actually from the street itself. Your wall will give you all the privacy you need.

FWIW, there's been at least one other widespread implementation of this already. It was A9.com, owned by Amazon.com. As far as I can tell they abandoned this part of their business, although I suppose it's possible they sold the technology and/or their photograph database to Google.