For anyone that just can't wait, I got an email from Kanger sales in China. Pre-orders made today will ship on June 1 (for black) and June 6 (for white). The price is $83 for the kit, plus $24 for 2 day DHL shipping. That's double the price of waiting, so it's not for me. But there may be others...
The shipping dates are interesting because I suspect those are the dates vendors have as well. Maybe a day or two earlier, but not enough to make much difference. No mention of silver?