The dealer thought as early as late July, but possibly as late as August or September. But he said we'd just have to wait and see how smooth the rollout goes. On some of the accessories, they didn't even show up in their system yet. So some of the items show up on my order with "unassigned" OEM codes.
I just figured ordering early gave me the best chance of having one to ride this year. As expensive as these things are, maybe orders will be sparse. But if people like them, it could be a big wait to get one ordering later.