Not really, the above link has the perks but unless you pay for the Disney Card w/ the $49 annual fee you don't get anything extra for paying with your Disney card (just the normal 1%). And unless your purchase is at least $50, then no discounts either.
If you do sign up, make sure to find an offer with a good sign up bonus, I've seen them out there for as much as $200 (that is sent in Disney Gift Cards).