http://www.davidhorvitz.com/2008_sky.html
If you send him your email address, David Horvitz will send you a photograph of the sky for every day of 2008. He also has unusual things to sell. e.g. “If you give me $10 I will take a photograph of a mailbox in New York, print it as an 8.5" x 11" full color laser jet print, fold it into an envelope, write where it is on the back of the envelope, and mail it from the same mailbox.”