According to Apple's iPhone availability tracker, the iPhone 3G is sold out nationwide. Piper Jaffray analyst Gene Munster is reporting that there's a four week wait for new stock to arrive stateside.
Munster says that Apple didn't correctly predict the initial demand for the product and has been left without stock to sell. He believes four weeks is the lead time Apple needs to ramp up orders and get new units delivered to its stores. "I bet we'll see these problems for another two to four weeks. Early demand has been more than they expected. There were outages last year, but not to this extent. This is a more sustained outage, and the demand seems to be sustained. Sales internationally have taken inventory away from the U.S.," he said.