Apple's online store now lists both iPad Wi-Fi and iPad Wi-Fi + 3G as shipping in 24hrs, and not just in the US but in international stores from Canada to the UK as well.
Supplies of Apple's "magical and revolutionary" new device have been highly constrained since launch, leading delays in international rollouts and concerns that the IPS panels just couldn't be made fast enough to meet demand.
Did demand slow or did production rise? We'll have to wait for next quarter's results to find out.
[Thanks everyone who sent this in!]