Razer Mamba - 1ms 5600dpi "wireless" mouse

"According to Razer reps, the reason the Mamba can do this is because they’ve managed to obtain a 1-millisecond response time over 2.4GHz wireless, the same speed that they use in their wired mice, and have an individual MAC address for each mouse. At that speed and a tap-to-spin-180-degrees resolution of 5600 DPI, gamers will be able to frag for 14 hours straight on its 800 mAh lithium-ion polymer battery. There’s also 64KB of internal memory for 500-keystroke macros."

Hands-On Mamba, Razor’s Cord-Cutting Laser Mouse