The email also states:
Plus, on May 3rd and 4th only, be entered in a chance to win a first-edition Ultimate Collector’s Millennium Falcon™
Update: I got yet another email with more details:
Place an order through LEGOshop.com on May 3rd or May 4th and you will receive an exclusive LEGO® Star Wars™ poster, each individually numbered up to 15,000, celebrating the LEGO Star Wars 10th Anniversary and featuring over 160 minifigures that have appeared in a LEGO Star Wars set in the last 10 years. You will also automatically be entered to win a first-edition LEGO Star Wars Ultimate Collector’s Millennium Falcon™ - number 5, 6 or 7.*!
Hit the image to go directly to their promotion page.