I wish I had more reasons to use multi touch. Well, at least rotate. Without handling many photos or documents that could use it, this one has gone pretty much unused.
After using an iPhone from day 1, the pinch zoom was an easy transition. The 13" screen of the MBA was the smallest I'd used since the mid 90's, but after being used to zooming into stuff on the iPhone in order to read it more easily or see details, it was a natural transition to do the same thing on the MBA. Mostly on websites and doc's as on the iPhone.
Three finger swipe was not as easy a transition from using a similar motion on the iPhone. On the iPhone any time you're swiping like that, the visual feedback is very fast...almost instant. Ex: swiping b/w photos or weather for different cities. From a UI perspective, I expected, even though I shouldn't, the same thing to be true on the MBA. But, to use three finger swipe to go back a page in Safari it's not anywhere near quick visual feedback as it takes a bit of time for the previous page to load. It doesn't help that I'm typically using a mobile internet connection from VZW on my MBA. Although it has other places to use it where it is instant, the most common for me is in Safari. And yes, like others, I've caught myself trying to do a 3-finger in F'fox to no avail.
Now that it has found its way into the more "mainstream" Mac laptops, I'm sure they'll come up with more ways to use it...and more ways for us to learn, perhaps even some un-thought of uses in future 10.5.x releases.
