Compare Google Maps and Microsoft Virtual Earth
An enterprising coder has put together a page that allows you to compare the results from Google Maps and Microsoft Virtual Earth for any given address side-by-side. It's fun to see who's imagery is more up-to-date, or which is of a higher quality. The site is understandably slow at the moment, so you may want to try during off-peak hours. Post your thoughts in the comments here; overall, which service has the best product and why?