The new sports catalog is out for March, 2009 and there are two cheats.
The first is the green baseball uniform. You get it by clicking on the little yellow penguin standing back in the trees.
The second is the red baseball cap. You get it by clicking on the pitcher’s mound in the furniture section of the sports catalog.
I guess Club Penguin is really excited about baseball season starting soon!
Thanks to SecretPenguin for finding these.