Readers are reporting they can no longer buy an iPhone 4. Supplies are sold-out, but even more telling the Apple stores can’t even predict when they’ll have product to sell. This strongly suggests Apple has halted production and is going for a hardware fix. Not surprisingly, this unavailability hasn’t been noted yet in the press but I’d expect it to be a major issue at today’s press conference in Cupertino as Steve Jobs attempts to explain his way out of the current PR fiasco.

Update — The Apple event is over and all iPhone 4 users are getting free bumpers.  But I stand by my story.  Mrs. Cringely has a bumper and still finds her iPhone 4 almost unusable.  Apple must be working on a true solution to these problems for future production.