[chc]

It's not as though the public SDK was a totally new thing. It contained some new components, but AFAIK most of it was existing stuff that they just hadn't released an SDK for (heck, a lot of it was stuff the iPhone inherited from OS X). All the awkwardness surrounding the SDK's actual release — for example, the neverending, absurdly restrictive NDA that seemed to flummox Apple's own community reps — really did feel like a rush job. I find it a little weird to think that Apple didn't intend to release the Cocoa Touch SDK after touting it so highly, but it did kind of feel that way.

And the App Store was just an extension of the iTunes Store. Adding a section to your existing online store in one year is not exactly breakneck speed.