The document lists hid and usbmouse as some of the required modules to get your USB mouse working. I spent hours messing around with this before I read in the menuconfig help that you can only use either 'hid' or 'usbmouse'. Once I tried removing hid, I was finally able to get output from /dev/usbmouse and get my mouse working.
Fixed in the CVS. Note about using either usbmouse or hid added.