The i-rocks RF-7550A 2.4GHz Cordless Optical Mouse is a decent mouse created by a company that doesn't believe in the famous marketing dictum that to keep your customers happy you should "under-promise and over-deliver."
I desperately wanted to hate Logitech's V550 Nano Cordless Laser Mouse for Notebooks, but I instead found it to be the best notebook mouse I've ever used.
The Pebble Wireless gets the basics right--mostly. Its laser tracking system makes it effective on almost any surface, its 2.4GHz wireless circuitry is resistant to interference, its two ambidextrous buttons and scroll wheel provide just the right amount of resistance, and its 105 grams gives it a solid feel. Also, its USB dongle is conveniently tucked away between its two AAA batteries (off-brand, but included), which are accessed by simply swiveling the mouse's top half 180 degrees.
With the exception of Apple's now-defunct single-button mouse, input devices don't get much simpler than the Kensington Ci73 Wired Mouse. It has two buttons and a scroll wheel. That's it, folks--you can go home now.
You can never be sure what advances will find their way into the next round of Apple hardware updates until practically the moment Cupertino makes the big announcement. But that doesn't mean it's not fun to guess a little bit.