The first full version of USB Overdrive has been released,. USB Overdrive is a USB device driver designed to add more functionality to devices including mouse and trackballs. The latest release features support for gaming devices. According to Alessandro Levi Montalcini:
The first full Mac OS X release of the USB Overdrive is now available. This version runs on Mac OS X 10.2 and later and finally includes support for gaming devices.
The USB Overdrive is a universal USB driver that handles all USB mice, trackballs, joysticks and gamepads from any manufacturer and lets you configure them either globally or on a per-application basis. It reads all kinds of wheels, buttons, switches and controls and supports scrolling, keyboard emulation, launching and complex actions as well as all the usual stuff like clicking, control-clicking and so forth.
You can find more information about the USB Overdrive release at the Alessandro Levi Montalcini Web site. USB Overdrive is available for US$20.00.