Thanks for the info. I have got control of my keyboard and trackpad again, but I can't do two finger scroll anymore. Everything else seems to work though. Any ideas of what I should do?
Try Onyx from http://www.titanium.free.fr/pgs2/english/download.html to repair permissions. My trackpad didn't have 2-finger scrolling when I repaired permissions with Disk Utility. After repairing permissions with Onyx and rebooting, I had 4-finger gestures. I hope it works for you