I took some pictures showing the size difference between the 770 and iPhone. iPhone is really is smaller than you'd first think. Unfortunately, it also has a lower resolution screen than the 770. The zoom feature makes up for that somewhat (see the last picture in this post for an example of a zoom). It is nice that Safari always renders the whole page, so there is not any horizontal scrolling (unless you pinch-zoom). On the 770, boing-boing was wider than the screen and so it used a horizontal scroll. You can see that Safari didn't render the flash banner add on the top of boing-boing. You can also notice in the first picture that Safari does a better job of using larger fonts- the smaller screen is more readable than on the 770.
The touch-screen on iPhone is remarkably different than what is on the 770- it only requires the lightest touch of a finger, not physical pressure. Using a stylus on iPhone doesn't work- the screen is using the conductivity of your flesh to make contact, more like a touch pad on a laptop than a traditional touch-screen.
You can click on each of these to load a larger version in a new window.
The iPhone and the 770 both rendering boingboing.
Size comparison- stacked up.
Safari zoomed for the main column of text on boing-boing.