Check out the official site of the Transformers movie for a newly announced special promotion.  Book a group of 100 people to see Transformers Movie and you win a spcial prize pack including the Transformers Movie video game, Transformers cap, t-shirt, and car freshener and a 20th Anniversary Optimus Prime, see the "book a group..." link toward the bottom of the page.  To claim your prize you must contact the Group Sales Department' at Paramount at 877-727-4775 or group_sales@paramount.com. 

You also have the ability to book a Transformers birthday party!  Yeah!

Thanks to Master Dex for the news tip.