Okay, so this does not *directly* apply to SharePoint -- which also has a ribbon interface -- but it's pretty cool.
If I said there was something you can download which is a game, teaches you how to use Microsoft Office 2007 and 2010 products and you can have it post your skills to Facebook would you be interested?
I thought you would. http://www.officelabs.com/ribbonhero
There's lots of great stuff here on Office Labs, but this is one of my favorites. If you install this add-on, you can have the program walk you through guided lessons. My personal favorites are the Sparklines in Excel and the colorful diagrams in Word. Let me know if you learn something!