Apparently, there was a mailbox that was decorated to look like R2D2 of Star Wars fame on the corner of Main Street and Fitzhugh Street. It was created to celebrate Star War's 30th anniversary in 2007.
Photo by Grilled Cheese
The US Post Office placed the mailboxes in 200 US cities to promote their Star Wars stamp offerings. 1
See also Photo and Article on The World of Star Wars