Just perusing some vendors...
Golden Motor order page sends mixed messages. It shows "in stock and ready to ship" but at the top of the page it says preorders will ship in 6 to 8 weeks.
Johnny NerdOut just says preorder with no indication when they will ship.
Electrify order page would lead you to believe that it is in stock and ready to ship but in the "description" drop down it says shipping in early August. Based on my experience with them last go around I wouldn't trust anything they say. IOW, I'd add at least a couple of months to that August estimate.
Another oddity is that on Electrify under "specifications" it lists the motor as 4000W max but then says the firmware version that will be available is for 250/750/1500W. Maybe they are referring to the default assist level powers, but who knows.