supply issues at AT&T store. According to their survey, 95% of buyers purchased the 8GB model with 50% of all buyers making the switch from another carrier to AT&T. Great news right? Maybe, but in a potentially worrying trend, Apple is showing a marked decrease in iPhone availability at their retail locations this morning. While stores showed a 100% iPhone availability (they don't break it down by 4GB and 8GB models) on Saturday which dropped to 84% on Sunday, Apple's retail channel is showing a further decline in availability for Monday across Apple's brick and mortar retail business. In particular, Californians not living in San Francisco will have a tough time locating the device with 34 of 36 stores bleeding red on Apple's retail locator site -- a potential supply problem especially if AT&T shops remain void of product. Sure, you can still order on-line albeit with that same 2-4 week delivery delay we've seen since day 1.
Update: Global Equities Research claims 525,000 iPhones were sold through Sunday. A quick calculation shows that only 61% of Apple's 164 stores are stocked with iPhones for today or 23% fewer than yesterday.