I was using flick scrolling and slide-in windows in enterprise apps before the iPhone came out. Should I be mad, too? Hardly. I'm glad that Apple brought out what most people had only seen in labs or one-off solutions.
Double-tap zoom was partially taken from the Netfront mobile browser, which a lot of us used on WinMo and other systems. Apple even acknowledges the Netfront patent within the iPhone patent.
Pinch is decades old. As for its use in multitouch phones,
it was announced for a Linux based phone two months before the iPhone was shown. See the demo picture used in an article below. Of course, since it wasn't from Apple, few except those of us in the business paid attention.