Yes, but to a point. I still believe Apple should sell an external trackpad that connects via USB, to replace the mouse. Think of an external multitouch trackpad that connects to a Mac desktop (or older MacBook) which is a little smaller than a mousepad. Besides, I find myself using a mouse less and less.
Totally agree. The mighty mouse is nice in concept, but it's not really precise, pretty fragile and once you dirtied up that clito... scrollball, it's doesn't really scroll well. I also noticed I don't instinctively lift my left finger when right clicking (musical instrument background... you learn to minimize your hand movements to play faster and longer...). The missing trackpad is actually one of the reasons I'm not buying Mac Desktops anymore.
I have a pretty decent mouse (Logitech G5 used via SteerMouse) but for regular desktop tasks, even Photoshop, I much prefer using my old Macbook's trackpad. It's closer to the keyboard (here we go again... minimizing movement), scrolling in two dimensions is exceptionally comfortable (and silent!) and it's pretty precise. With a mouse, clicking a button might move the pointer a bit if the mouse pointer speed is all the way up, causing a dragging action rather than a clicking action.
Also, OSX's mouse acceleration is really, really bad. It's like Apple wanted you to hate the mouse to get you excited about all-multi-touch computers. But I believe it's always been like that in OSX. I'd love to be able to switch the acceleration completely off and be able to crank the mouse speed up 3x more than currently possible. SteerMouse was a good investment though.
A USB Trackpad would indeed be awesome. Slightly angled upward (like the aluminum keyboard) and clickable glass like on the laptops. How about having a touch screen in there? Think iPhone screen, but with the roughed up glass (so your finger doesn't stick when dragging) and clickable, just like on the unibody Macbooks.
You could display the hot corners on it, a number pad or other simple gizmos that become active if you're resting your thumb on a certain area. Make a bluetooth version that can work as an Apple Remote 2.0! Display a touch keyboard on it. Eventually, people will stop using the keyboard to enter small things like google searches and will embrace full multi-touch Macs.