Beginning July 21st you can enter to win a walk-on role on Mad Men Season 4. From 7/21-8/11 just stop by any Banana Republic to get you entry code, then enter a photo of yourself in you best "Mad Men" style. Personally I have dresses that would give Joan Holloway a run for her money, so you know I will be entering the contest.
Note To Self: Mad Men Season 3 begins August 16th at 10/9c on AMC. If you would like to catch up on past seasons, the pilot is available online here and Season 2 DVD goes on sale July 14th.