Bought MX900 as well...
I too bought the MX900 and just like 'richc' already told us, I too discovered that NONE OF THE "Other buttons" are functional except for using Expose commands, and that aint the only reason why you shouldn't even touch this pricey mouse until its made for mac. Even when you install the MX 700 mouse software (file "lccinstalldisk111.dmg") and try to use it for the MX900 bluetooth mouse, there is absolutely no communication between the bluetooth mouse and the MX700 settings you assign in the installed (MX700) preference pane settings found under system preferences. Trust me it doesn't work and it will not work! Don't even think about it. I do like the Bluetooth aspect of not having to rely on and connect via the big bulky wireless USB receiver sitting on my desk which although is RF, still requires a near line of sight conduit and for that reason alone I might consider buying the MX900 when Logitech finally, or should I say, eventually maybe will consider supporting the Mac market and get their shiite together and make it mac-compatible, but until then the RF version MX700 is superior. I also was quite disappointed in the "action" and precision of the MX900 mouse...that is, its not as smooth (in fact almost choppy) compared to the MX700, but this was before I accepted the fact that this device wasn't made for Mac and that is why they're not advertising it as being Mac-compatible, as it simply is not "optimized" for the Mac yet. Until then, it is definitely a NO-GO at this time! I was excited to know, however, that it worked via the bluetooth connection, and it did so seamlessly (recognized by hitting the "connect" button on the underside of the mouse or keyboard) and going into the "bluetooth preference pane" and checking 'discovered' devices and then "pairing" with the 'discovered' Logitech mouse and/or keyboard, but it is nowhere near acceptable cause it simply aint ready for primetime..... As you will quickly notice that it is only fairly accurate in mouse tracking, and without the ability to assign various commands made simple using the Logitech preference pane, why pay that kind of money to have a multifunctional bluetooth mouse just for the tracking. As for the keyboard, I didn't have the energy to go thru the plethora of assignable keyboard commands, but I would imagine these too would be incompatible with the MX700's pref pane.
AGAIN, I believe this will be the best Bluetooth mouse and/or keyboard out there when its ready, but accept it, its not ready cause it hasn't been optimized for Mac plain and simple. It aint cheap either. comp usa, ah-hem, ...conveniently.... stocked only the keyboard and mouse as a combo purchase rather than the mouse alone for a whoppin' $196 tax included.....ouch! I thought about the Microsoft bluetooth mouse and keyboard, but Microcenter said it was proprietary to PC as well, and it doesn't have as many command buttons as Logitech, not to mention a cheesy blue appearance (in my opinion) and monolithic receiver dock......what can I say, I'm sold on the Logitech and will hold out till its ready for Mac. Fortunately, I have a PC in dire need of bluetooth keyboard security and bluetooth range, and after taking it on a test run on my PC I think I'll keep this bad puppy and use it on the system it was optimized for thus far, the PC. The horror and irony that this dark-age system (PC) gets all the attention of cool peripherals. As far as performance on the PC, it totally ROCKS! Extremely accurate (same as wired mouse) and NO interference even nested in a pile of potentially interfering wires and completely hidden out of sight between huge magnet speakers and two large Cinema displays which would have sent my cursor into hyperspace when I was using the MX700 on the PC. As for my Mac setup, I use a G5 and simply plugged in a D-Link into the back of my Apple display's USB hub. (D-link is a tiny USB device that acts as your sole bluetooth receiver (D-Link model: DBT 120)
Darn! I really wanted this mouse for my Mac G5 and have written Logitech multiple times to get going on this thing. I also expressed to them that if they don't do something soon I'll buy from competitors and that they'll not only lose a Mac customer's business, but also a multi-PC customer equivalent to 5 sales, are you listening Logitech????
