The USPS has released the designs of the five stamps honoring "The Simpsons" to be issued May 7. Pictures of the stamps and information about how to order them, along with details of how to vote for your favorite character, can be found here .

There's also a contest for 25 a limited-edition Simpsons posters to be signed by Simpsons creator and executive producer Matt Groening. Winners will be notified the week of May 18 - 22, 2009, the Postal Service said.