It's safe to say there's a lot of interest in the iPhone SDK. In the first four days since its release on March 6, the SDK has been downloaded 100,000 times. Also, the video of the press event at Apple.com has already been viewed more than 1,000,000 times.
That's a lot of interest in something that's only truly meaningful to one group of people - developers. But I see where the anticipation comes from.
As a consumer, I'm just as excited by this release. When I first started playing with the iPhone, I said that it feels like a computer that happens to make phone calls, not a phone with some additional features. The promise of great native applications by some of my favorite Mac developers reinforces that feeling.
The iPhone is quickly becoming my favorite Mac.