Offline FaceFX documentation is now available here:
http://www.facefx.com/downloads/FaceFX_2009_Documentation.zip
It's a mirror of what's online here:
http://support.oc3ent.com/fogbugz/default.php?W18
If you need to look something up while you don't have an internet connection or while our support server is offline, you can still get a recent version of the docs by downloading the zip file and extracting it on your local machine.