I have another voice to add to this discussion:
While configuring via xorg.conf is possible... (by the way, please read "man synaptics" from the Terminal or command line for the possible options) xorg.conf seems to conflict with HAL's (the Linux Hardware Abstraction Library, which auto-configures most hardware now) autodetection of your touchpad.
So while your touchpad should work decently once you get it working through xorg.conf, there may still be a glitch or two. For more information on configuring your touchpad through HAL instead of through xorg.conf, please see the following thread.
And check my first post. It links to the bug report which describes your problem -- tapping doesn't work -- and explains why all these other problems with Fedora's synpatics drivers are occurring. The reason why is because XOrg is currently transitioning from xorg.conf to using HAL for device configuration.
At any rate, you still need the options to configure synaptics. From the manual page, I prefer using
These options are very useful, and enable tapping, as well as right-clicking by using the bottom-right corner of the touchpad. Please see the Synaptics manual for how to use these options.
(If you don't know how to open a terminal, in GNOME or KDE, type Alt+F2, then type "gnome-terminal" for GNOME or "konsole" for KDE. Then try the "man synaptics" command to read the synaptics manual).
I recommend you read the thread I posted above, since the pages I've linked seem to really explain all the problems with Synaptics right now.