I bumped into Jeremy LeBreton from AltRider at an ADV rally in southern California this weekend. I asked him about delivery dates for the AltRider crash bars for the AT. He started by apologizing for the delay - it seems that both the engineering as well as the manufacturing process were tougher than planned. He said (as others here have confirmed) lower bars have started to ship already. The Upper Bars should ship next month (May) and the Reinforcement (tie) bars should ship in June.