Clippy
OK, OK, you asked for it!
Check out: http://www16.brinkster.com/rachelreese/merlin.aspx
The code is just JavaScript, so feel free to view source and steal all you want. (oh, and uh, don't click around the site... I'd say a full 79% of the links are broken. Or if you do, be warned. )
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It all began as a joke on my manager... he had the nerve to ask for a help section to my perfectly designed and completely user-friendly application. Hrmpf. It now looks like we might actually implement this guy in our live version of the app. Fooled me, didn't it?
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By the way, I know some of you folks played around with this a little... any stories?