According to Piper Jaffray analyst Gene Munster, sales of the iPhone have climbed from 9,000 per day at the $600 price point to 27,000 per day at $400 a pop. But can the iPhone keep it up?

Probably not, Munster says. He believes this initial surge will eventually scale down, leveling off at a solid 50% increase in sales compared with the pre-price cut number. If you believe the Munster Math (didn't he way over-predict initial iPhone sales?), that means 13,500 iPhones sold per day.

If the iPhone keeps that pace up, Apple will sell almost another 1.5 million of them by Dec. 31 (not including any bumps due to the holidays). That would make total 2007 sales of the iPhone 2.5 million. That's 250% higher than Apple's initial target. El Jobso can't complain about that, and neither should shareholders.

It would be great to have some sales figures of other smartphones to compare this against. We already know that the iPhone outsold all other smartphones in the month of July. Is it still outselling them? RIM, HTC, Palm, care to comment?