It's rather ironic how much I had to scroll to read that blog post...

What's the equivalent of a rollover effect for touch?

Maybe the Web doesn't need rollover effects.

Or more to the point: maybe we should just try something new!

TouchUpOutside

Essentially, the user touches an interface element, then slides their finger off the element to "cancel" the touch.

For most iPhone UI buttons/elements, it doesn't register a button click unless the the finger touches down on the button then releases up off the same button.

Do you mean UIControlEventTouchDragInside/UIControlEventTouchDragOutside?

This is par for the course on UI elements (including window controls) in OS X and I believe in Windows too.

Oh that discussion is raging right now among people. It was also brought up under the subject of Flash. I leave that for others to figure out.

Rollover doesn't have much meaning, but the start of a touch is analogous to the :active pseudoclass in CSS.