Alessandro Montalcini has done it again! USB Overdrive version 10.2.1 is out as of February 10th, and it's incredible! No other input device software for the Mac can compare. This is especially true if you bought your scrollmouse from one of those vendors who neglects to put as much (if any) effort and features into their Mac drivers as their PC versions. Especially exciting for us button-freaks with Logitech MX300 and MX700 mice because it now supports all eight buttons on those models, and much better and with many more features than Logitech's own drivers.
From the author's site:
...handles any USB mouse, trackball, joystick and gamepad 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 all the usual stuff like clicking, control-clicking and so forth.Very much worth checking out if you like multi-functioning mice and OS X.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20030214070428267