Just a quick post to show you something I came across today. This site is asking that as many people as possible take a photo and submit the best ones to them. The only stipulation is they must be taken on the same day (Earth Day - April 22) I plan on participating and cant wait to see what the other participants have to show. Even if you dont plan on participating you may want to check back and see what they have done for the finished product!
http://earthmosaic.org/index.html