In 11.04 the touchpad is recognised as a PS/2 Logitech Wheel Mouse - checking around the various touchpad debug pages suggests that the kernal in 11.04 does not register it as a touchpad.
Can anyone confirm that this issue is resolved in 11.10?
This is not a direct answer but I had similar issue with 11.10. The fix developed by Seth Forshee available at https://bugs.launchpad.net/linux/+bug/550625/comments/492 solved my problem and also worked for A LOT of people.
It is worth checking it out and asking there about it. It definetely might be the solution IF the output of