If anyone knows what I need to apt-get to make my Dell Inspiron 8100 touchpad work with kernel 2.6 in debian, please email me. Apparently there's some new X driver that I need. Or maybe I'm supposed to configure it as a PS2 device.
Update: I received several answers, mostly involving installing a synaptic touchpad driver from source. But enveraltin showed me that I just need to add psmouse to /etc/modules, and that you can get it working quickly with a “modprobe psmouse” command. I think Jan Van Buggenhout was trying to tell me the same thing, but he vastly overestimated my understanding of these things.