I've got one word for Apple's Mighty Mouse: Quirky.
Rather than physically distinct buttons, the Mighty Mouse employs "touch sensors" to maintain a sleek Mac aesthetic. Primary (or left) clicking works fine. But for a secondary (right) click, you need to lift both fingers from the mouse before re-applying a single finger. In other words, as long as the primary sensor detects a touch, the click is primary. Furthermore, if your fingers tend to slide away from the far end of the mouse (where the sensors are), all clicks are interpreted as primary.
I guess I'm a sloppy mouser. I thought I would get used to this, but I have to admit it's a pain.
Even if a Bluetooth version of the Mighty Mouse is on the way, I'm not convinced that it's worth waiting for. So for my PowerBook, I finally strayed from Apple's offerings and bought a third-party mouse. (Insert gasps of disbelief.) Logitech's Bluetooth V270 even comes in silver to match the PowerBook. So until Apple figures out how to make a mouse with more than one button...
"We're kind of on the level of crossword puzzle writers... And no one ever goes to them and gives them an award." ~Joe Strummer sscce.org