Out with Mandrake, in with Debian

I installed Debian last night and must say I love the packaging system. apt-get has to be one of the coolest utils I've seen. I've got LILO configured so I can now boot Win and Debian, but I did run into a problem: I cannot get X to find my mouse.

I have a USB Intellimouse optical. I've tried /dev/usbmouse and /dev/mouse. There was another device /dev/something/mice, but I can't seem to find it. This is the only hangup I have with my system right now. Any help would be appreciated.