Apple today released the following statement:

iPhone has already passed several of its required certification tests and
is on schedule to ship in late June as planned. We can’t wait until
customers get their hands (and fingers) on it and experience what a
revolutionary and magical product it is.

However, iPhone contains the most
sophisticated software ever shipped on a mobile device, and finishing it on
time has not come without a price — we had to borrow some key software
engineering and QA resources from our Mac OS(R) X team, and as a result we
will not be able to release Leopard at our Worldwide Developers Conference
in early June as planned. While Leopard’s features will be complete by
then, we cannot deliver the quality release that we and our customers
expect from us. We now plan to show our developers a near final version of
Leopard at the conference, give them a beta copy to take home so they can
do their final testing, and ship Leopard in October.

We think it will be well worth the wait. Life often presents tradeoffs, and
in this case we’re sure we’ve made the right ones.