Today (well June 9th) is Les Paul's birthday and Google has some kind of guitar strumming thing going on that you can interact with your mouse on their main page replacing the google title.
It's kind of addictive actually. If you press the rectangular keyboard button, your keys play the strings which is great for playing chords piano style. It goes from the left to right in G (for Google) major, ie: QWERTYUIOP plays GABCDEF#GAB
Unfortunately it shows the limitations of keyboards without full NKRO however because sometimes you can't press all the keys you want at once.
http://www.google.ca