I use a big external monitor at work, and carry my MacBook around. I've found that Spaces is not much needed when I have two monitors rather than one. However, bringing up Spaces System Preferences panel just to toggle Spaces on and off is a pain.
So I wrote a small AppleScript that toggels Spaces on and off: Or if you prefer, you can download Space Toggler (20KB), which is a little script application that includes Growl notification. (These scripts originally appeared in this entry in my blog.)

