Bad news for fans of rooster helmets who have yet to preorder.
It seems Gamestop/EB Games has removed the banner announcing the rooster helmet preorder bonus. Indeed, any mention of the bonus has been removed entirely from their website. I'm going to assume this means they're out of stock. I'll await confirmation before saying it's gone, but it's looking that way.
However, if you're still itching for a preorder bonus, then perhaps you should check out Gamecrazy, who is offering a Scribblenauts notebook as THEIR preorder bonus. It's not the same as the rooster hat, and I'm about 90% sure this notebook can't summon in any object you want...but it's better than nothing, right?