I copied the following Bash script from MacScripter and combined it with TextExpander's ability to execute Apple Script in order to give me the ability to switch to the Login screen via a keyboard shortcut (I mapped it to 'ffus').
PLAIN TEXT
BASH:
#!/bin/sh
# Fast User Switching from the command line
# I saved mine as /usr/local/bin/fus
CGSession='/System/Library/CoreServices/Menu Extras/User.menu/Contents/Resources/CGSession'
case "$#" [...]