The May release rumor
In that article we stated the we received a tip that Apple will be announce the 3G iPhone sometime in May and then a new product at WWDC 2008.  You can read the post about the 3G iPhone and the potential "new" device announcement at WWDC in its entirety here.  If the rumor is true, we would be the only outlet that has pointed out the possibility of a May release.

Recent iPhone supply issues
Over the past few weeks, the shipping time for the 8GB and 16GB iPhone models posted at the Apple has varied from 24 hours to upwards of seven days.  Furthermore, many Apple retail store visitors have described iPhone shortages over this same time period.  European carriers and resellers  in the UK and Germany have also demonstrated availability issues recently.

It has been expected that Apple will introduce the next-generation iPhone at the 2008 Worldwide Developer's Conference slated for June.  However, today's lack of iPhones at the U.S. online store may point to the possibility of a release prior to the June event.  We bring this up as no stock on hand for upwards of a month does not seem to be a strategy that Apple would endorse.  Perhaps it is just a short term supply disruption but make no mistake, the next generation iPhone will be released soon.