Pre-orders for the iPhone 4S topped one million units in the first 24 hours.

“We are blown away with the incredible customer response to iPhone 4S,” said Philip Schiller, Apple’s senior vice president of Worldwide Product Marketing. “The first day pre-orders for iPhone 4S have been the most for any new product that Apple has ever launched and we are thrilled that customers love iPhone 4S as much as we do.”

Shipping times are now quoted as 1 – 2 weeks.

I like Horace Dediu’s reaction

How to sell $650 million in 24 hrs:

Step 1) Disappoint everyone in the tech universe.

This news confirms what should be obvious: the iPhone 4S is going to be a monster product for Apple.

For those of you who fear that all the time you invested in learning Reverse Polish Notation (RPN) was wasted, prepare to rejoice. 

HP has announced that two of its classic calculators, the 12c financial calculator and the 15c scientific calculator, which will cost $14.99 and $29.99 respectively, will be available on the iPhone and iPod Touch.

While these prices are high for iPhone apps, they are cheap considering the physical 12c Platinum costs $66 on Amazon.

If you look in any financial institution, you will undoubtedly see “old timers” still toting their 12c’s around.  For many years it was the de facto standard of financial calculators.

Another nice touch was the inclusion of the quick reference guide, which can be accessed by tapping the HP logo.  This same reference guide is printed on the back of physical HP 12c’s.