You'll start seing Google everywhere now that they are going public. They have to enter the "traditional" media/marketing arena in order to continue to compete with the likes of Yahoo and MSN.
Be sure to keep it unopened, in a safe place. In about 50 years your grandchildren will be able to sell it for big bucks on Ebay
I got one a couple days ago. It was fun to get it in its cute little Google envelope. Mhdoc, I bet you're right that it will be worth something one day.
I snapped a couple of photos of the booklets for those who didn't receive them. They are sooo cute! The booklet I received came in a ziploc Google bag, so unless you threw the bag away, you could probably just zip it up and have no one the wiser