I'm laughing, cuz I also had the same problem. Touchpad driving me ABSOLUTELY bonkers, moving around the screen all the time, and no where in the BIOS to shut it down.
Never fear ... here's my solution:
I created two bash files, and placed them in my /home directory, and copied a symlink to them in /bin. One is called TouchpadOff, and the other one is called TouchpadOn.
Each bash script has one simple line (after the shebang) ...
TouchpadOff's line: synclient TouchpadOff=1
TouchpadOn's line: synclient TouchpadOff=0
Solved the problem for me. I just run the TouchpadOff script when I log in. Alternatively, I could also just insert it into my .kde4/Autostart folder (which I'll probably do when I install PCLinuxOS 2010 Final).
I hope this helps!