!Geography Games
Subtly and mostly because no one cared, I installed some Geography Games on the computers in 2006:  http://familygames.com/freelane.html

Then in 2007, when the new Dells arrived with Google Desktop preinstalled, I put the Geography Challenge on the desktops of all the [380] machines. 

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!Geography Screensavers
In 2006 there were between 20 and 30 old map pictures in used as the screen saver for the computers in the labs.

Now in [380] there are 700MB worth of pictures of old maps.