Multitouch and the synaptics driver are installed and ready for use. Have you checked the touchpad settings under System > Preferences > Mouse and the Touchpad tab?
If you are not able to activate multitouch like me:
you can force the setting by
gconftool-2 --set --type=int /desktop/gnome/peripherals/touchpad/scroll_method 2
If multitouch is not working after this, try a reboot. If it is still not working, try the following script:
#!/bin/bash
# list of synaptics device properties http://www.x.org/archive/X11R7.5/doc/man/man4/synaptics.4.html#sect4
# list current synaptics device properties: xinput list-props "SynPS/2 Synaptics TouchPad"
#
sleep 2
xinput --set-prop --type=int --format=32 "SynPS/2 Synaptics TouchPad" "Synaptics Two-Finger Pressure" 10
# Below width 1 finger touch, above width simulate 2 finger touch. - value=pad-pixels
xinput --set-prop --type=int --format=32 "SynPS/2 Synaptics TouchPad" "Synaptics Two-Finger Width" 7
# vertical scrolling, horizontal scrolling - values: 0=disable 1=enable
xinput --set-prop --type=int --format=8 "SynPS/2 Synaptics TouchPad" "Synaptics Two-Finger Scrolling" 1 1
# vertical, horizontal, corner - values: 0=disable 1=enable
xinput --set-prop --type=int --format=8 "SynPS/2 Synaptics TouchPad" "Synaptics Edge Scrolling" 0 0 0
# stabilize 2 finger actions - value=pad-pixels
xinput --set-prop --type=int --format=32 "SynPS/2 Synaptics TouchPad" "Synaptics Jumpy Cursor Threshold" 120
#xinput --set-prop --type=int --format=8 "SynPS/2 Synaptics TouchPad" "Synaptics Tap Action" 0 0 0 0 1 2 0
If this makes it work, put it in a file, make it executable and add it to your Startup Applications.