Obama rapid response

I've commented previously (as have numerous others) on the Obama campaign's great rapid response team -- they have new ads out in a flash, seizing one opportunity after another to hammer home their message. They've done it again, picking up on Dick Cheney's endorsement of McCain yesterday. First, Obama added references to it to his stump speech, and today there's this ad, contrasting some of Obama's endorsements with Cheney's latest: