Apple has proudly announced that more than 100,000 developers have downloaded the beta iPhone Software Development Kit (SDK) since its launch on March 6. The SDK includes a set of APIs and tools.

“Developer reaction to the iPhone SDK has been incredible with more than 100,000 downloads in the first four days,” said Philip Schiller, Apple’s senior vice president of Worldwide Product Marketing.”

A number of firms and developers used Apple's announcement to describe how impressed they were with the SDK.

“Apple’s tools have provided our development team the flexibility to make the SuitePhone application richer and deeper,” said Luke Braud, vice president, Software Development, NetSuite. “NetSuite is excited at the opportunity to give every iPhone customer access to their critical business data anytime, anywhere.”