IPhone’s Misplaced Decline Button?

Another serious problem with the iPhone interface is the placement of the 'Cancel' button in the "New Contact" screen. There's no reason to let the user throw away their just-entered contact in one step, especially when the 'Cancel' button is placed where the 'Back' button is on other screens.

While the iPhone is ringing, if you tap the power button twice quickly, it will send the caller to voicemail. A single tap will silence the ring. I thought most iPhone users googled lists of iPhone tips and tricks.

I've never noticed this problem. But then again I'm not popular enough to have to decline very many calls.

Can someone recommend other useful articles on context vs consistency?

My biggest peeve is that 'End Call' is a full-width button that I end up hitting very often mid-call. Why couldn't it be a slider too?

This is yet another moment where I'm glad the G1 has retained physical Send/End buttons on the phone, so that I can always just know exactly where to press at any point to start and end calls. Fewer buttons does not <i>always</i> create a better interface...

On a similar vein I've always wished for a "call back and delete" button on the voice mail.