You can Preorder in all other countries but America

[harry20larry]

As the launch date is pushed back in the other countries when you click on the 'Notify Me' button (usually 'Buy') it brings up an email address field which says:

If you’d like to be among the first to get your hands on iPad, just enter your email address in the box below. We’ll notify you when it’s available to buy from an Apple Retail Store or pre-order from the Apple Online Store.

Preorder is good for people who don't like queues!