Microsoft wireless optical mouse 2.0
One thing i can say about Microsoft there hardware is GREAT!
its bin working for 5 years now. cordless logitech = $hit you have to replace the battery ever week because the hardware sucks in sleep mode the mouse uses way to much power.
after a few months of always having a empty mouse just when you need it switched to M$
and never any regrets software is great the mouse is still working after 5 years and i abuse it a lot drop hit strangle and use. change the battery's about once every 2 months

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Asus P5W DH Deluxe runnig osx for 3 years now (10.5.4 ideneb)
Asus P5N 7a VM 10.5.7 custom installation
dell 6400 10.5.1 intel video
Iportable OSX86 universal = Live leopard for intel and AMD's on a USB stick!