According to tipsters whispering in Boy Genius Report's ear, this past Sunday AT&T was scheduled to begin slashing prices on iPad accessories by 50%. (Hence the image above: "half off," geddit?) The prevailing theory is that the Death Star is making room for the iPad 2, otherwise the stuff would still be full price.
The same tipsters suggest the sale would take place in "corporate stores," be that traditional brick 'n' mortar outlets or something else entirely. A quick scan of AT&T's website doesn't find anything with big "SALE! SALE! SALE!" signs on it, but clicking on a particular item does in fact show the 50% discount.