Your Mouse Is Probably Plugged Into The Wrong USB Port - Here's Why

If your mouse is ever laggy or skips, then it might not be an issue with the mouse itself, it could be the USB port that you have it plugged into.
CNET

Options for customizing Magic Mouse and Trackpad input

Various options for customizing Magic Mouse and multi-touch trackpad input are available for those who wish to have more utility than that which Apple provides. Topher Kessler MacFixIt Editor Topher, ...

If your mouse input is totally busted in Marathon right now, I may have the fix

Bungie is working on a real fix, but for now, try this.
Gizmochina

Logitech VOICE M380 wireless mouse with voice input support launched in China

The VOICE M380 looks just like the ordinary wireless mouse but there is a dedicated button that prompts the voice input. The M380 adopts a soft curve shape that provides support for the user’s hand, ...