Windows Live Local was mentioned in another thread
, and it's amazing!
It's another aerial photo site, like Google Earth or Multimap, but it's got some incredibly high resolution coverage. Some areas even have "oblique" shots, as well as vertical which allow you to "look around" and area. Better still, these images are relatively new (I'd guess last year or so), whereas a lot of the other stuff is about 5 years old.
PS Don't click on this site of you need to get anything done in the next couple of hours!