Club Penguin has added a new stamp category! Go to the new "Video Games" section...
...and you'll see the new "Game Day" category!
Nice! The Wii game, "Club Penguin Game Day" will be coming out sometime between late this month, September, through early next month, October.
Once you get it, you'll be able to upload coins, clothing and STAMPS to your online penguin through Wi-Fi!
Click here for Stamp Book cheats.