Apple's new multitouch trackpads are exceptionally useful, especially with the two-finger scrolling and easy access to expose. Coupling these functions with hot-corner access to spaces can make window management on the Macintosh an absolute breeze. It's well worth managing the few quirks that come with these advancements.
One thing people have had frustrations with is the zooming function in certain programs such as Photoshop and Safari. Since both scrolling and zooming use two-finger input, depending on how people place their fingers they can inadvertently trigger zooming when trying to scroll. In Safari, at least, there is a reset hot key if this happens, which can be very useful. Whenever you zoom in or out in Safari when using the new trackpads, just hit Command-0 (zero) and you will reset the page zoom. This is far easier than trying to use the trackpad to zoom back to the original size.
If zooming in many applications is a problem for you, we recently posted an article containing a couple of approaches to preventing the zoom from inadvertently kicking in. You can find the article here.Resources