The delay was due to a shortage of components, the company explained in an email. They expect shipment information to be updated by April 12.
This can translate into huge savings to some international customers. Reddit user SvenViking says this move would save them more than $132 AUD in expected costs. Iribe responded to the Reddit comment, confirming the savings and apologizing for not letting customers know earlier.
This article was updated to reflect that the shipping of pre-orders made to date will be covered by Oculus, not every pre-order going forward.