Do you dig those great maps from live.com or virtual earth?

Microsoft has started a video series talking about all the technology behind Virtual Earth.. including the aerial view (3/4rd view) used on maps.live.com I've just started watching, but this should be really cool to understand how they get these wild images! First episode starts here http://channel9.msdn.com/posts/Mark+Brown/Behind-The-Maps-UltraCam/ The second episode starts with them flying their 'ultracam'