Jim I don't think they will be mailed out until the early registration discount is over.

From their site:

Gate-N-Go: Your Green Light to Blow the Gate
Don’t forget, to save time, money and hassle, you must pre-register before July 5th, 2010. By doing so, we’ll mail you your entry window sticker and all the information you need to know once you’re parked, like where to get your goody bag, dash card, etc. Check out the FAQs for further information.

Please note: refunds will not be issued less than 19 days prior to the beginning of the event. Pre-registration discount ends July 19th and all registration fees will increase by $10.