Here's something I made recently at work.
http://www.microsoft.com/sqlserver/2008/en/us/costsavingscalc.aspx It compares some Microsoft software to IBM software. The more you save, the more excited the little people get. It is a follow-up to a previous online tool we built for them. It was pretty fun creating these little people and animating their resonses. It's amazing that I get paid to do this kind of stuff!
A little shortcut: After you've hit the "Show me the money" button, you can just use Cntrl+Shift+1...,2,3,4,5 to see the different reactions.