I haven't seen anything. Just found out about them on this thread.
Honda doesn't even have MSRP on their site.
It's a game changer for me too, though, like AkMtnHntr, I would have liked to have seen a 550-600cc motor.
I've been kicking around selling my '11 Foreman and getting a 550 Grizzly but I think I'll wait and see how these turn out.