When you look at the retired accessories list, you'll note that all of theStampin' Pads are listed. This is for two reasons:
(1) Craft Stampin' Pads will now only be available in black and white
(2) Stampin' Up! is introducing a new Firm Foam pad in their Classic Stampin' Pads with the 2012-2013 annual catalog. The Firm Foam pads offer better ink coverage and, in turn, better stamped images.