Oops! Our last tweet was wrong... We're only launching 1 pin this week. But... the current pin will also be around for an extra week! ^Polo— Club Penguin (@clubpenguin) January 22, 2013
The current pin will still be available while the new one is out - but only for one week. I guess that the new pin will be hidden in the Prehistoric Club Penguin! I was really excited for finding two pins - I think Club Penguin should hide one every week at each party from now on.