MacRumors.com

Both the U.S. and U.K. online Apple Stores are currently out of both the 8GB and 16GB iPhones.

Customers trying to order the iPhone will find that both models are "currently unavailable." This comes just days after UK's O2 carrier's website also reflected that the 8GB and 16GB iPhones were "no longer available". Some speculated O2's lack of iPhones might may have been a decision to deplete regional stock while awaiting the next generation iPhone, but it appears even Apple's U.S. supply of iPhones has dwindled down. Reports from U.S. retail stores have confirmed the same.

Apple has been widely rumored to introduce their next-generation iPhone at their Worldwide Developer's Conference (WWDC), though that event is still almost on month away. While it remains possible that this is a temporary supply issue, the proximity to WWDC will certainly generate a lot of speculation.