Kryptonite has been updating their "exchange" page on a regular basis to incorporate the questions that people have. Check that page a couple of times a week for updates.
-the exchange is based on the date you registered for the exchange, AND the availability of an equal lock. So, if you registered a "New York 3000", you will be e-mailed a postage return label when all of the people who registered THEIR New York 3000 ahead of you have been taken care of, and YOUR New York 3000 is ready to ship.
-if you do not have a computer (you would not be reading this) but Kryptonite will MAIL you the postage return label if you phone them and request that it be mailed. They accept voice mails.
-Kryptonite has sold millions of round key locks over the past three decades. Their factory in China is working hard to make flat key replacement locks. Although China allows factory managers to put a gun at a worker's head, and shoot workers who refuse to work 25 hours per day, the laws of nature win out. It will takes many weeks, and perhaps months, for Kryptonite to make enough locks to replace 30 years worth of locks.
In the meantime, most good bike shops stock the 2004 model New York 3000, with a flat key, and the OnGuard locks with a flat key. No matter how many locks you already have, if you live in an American city, you don't have enough locks.