We heard way back in January that Logitech was possibly planning to bring its gaming peripherals to the Mac, and that's exactly what's happened. Logitech has announced that its G series of keyboards and mice, designed to entice gamers with features like lots of extra customizable buttons, backlighting and even a separate LCD screen on the keyboard, will have support included for OS X on the Mac.
Officially, the Mac support is coming with six new models, which are set to be available in stores later on this month. But you can download Mac versions of Logitech's Gaming Software from its website right now, so if you have one of these gaming accessories already, chances are you can get some extra functionality out of it right away. My guess is that these keyboards and mice already worked with the Mac (Apple's done a great job making compatibility easy), but you'll now be able to take advantage of all of the extra functions that these "G" devices offer.
Logitech's gaming line also includes items like gamepads, joysticks and headsets, but the company is only supporting these keyboards and mice for now. Maybe in the future we'll see company-wide support for the Mac operating system.