Mine is being delivered today.
Bought at NewEgg and not a pre-order. Just happened to have caught them when they had four in stock. I was suspicious when their page showed In Stock, because I've been burned before in instances where an online store said "in stock", and then after ordering and paying, you get an email that there was an error, or some other such nonsense. As a precaution, I online chatted with their CS folks who confirmed that they had four in stock.
NewEgg is not a store that photographers often think of for pro equipment, but I've had luck there before, so taking a chance by checking to see if they had the lens was good fortune for me. And, having said all that, they were of course OUT OF STOCK by the next day, with the other three gone in a flash! Price was same as everywhere else... $2299. Looking forward to UPS this afternoon!!