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I think when it comes to Satellite imagery Google Earth has taken the lead.  I used to use it to find shortcuts when I hauled gas, but the photos always seemed outdated.  I've used Google Maps & Ted's Satellite (Bing Maps) since I've been cleaning roofs, but I've always been leery of their "freshness."  I just looked up my house on Google Earth and the photo is less than 6 months old.  We got a hottub last year & it's on there, but the cover is on the pool and we didn't close the pool down until late Sept./early Oct.  I had prettymuch quit using Google Earth but it appears to be updating as we go along.  I guess it's a tool worth stickin' back in the old toolbox.