For all those having wet dreams over google maps, then may I point you to MultiMap.com’s Aerial View that has existed for at least the last few years.
Here is a the MultiMap Aerial view of central-ish London.
Notice, that the street map is overlaid on top of the sattelite imagery as you move your mouse around the map. It doesn’t have the nice ajaxability of google maps, but it has been around for a while now, and the street map overlay is very cool. Aerials are only for the UK, though.