Pretty cool.  I wish I could move the string guides a bit so I can tune for other chords, but hey, cool enough.

Then neat thing is that you can record what you play.  Should be interesting.  I tried it out and this is what I got after 10 sec of messing with it.

http://goo.gl/doodle/XjoR

Yup, 25 years of guitar skilz are no help here.  However, the good folks at PCMag spent more then 10 sec.  Check this out..

After toying around with the Doodle for a while, Chris figured out which keys corresponded to which notes. The Doodle works on all four rows of the keyboard starting at 1, Q, A, and Z. On the A row through the semicolon, you can play an octave plus two notes. With that knowledge, Chris set out to play something memorable. A Beatles song was a logical choice.

Starting on the A-row, the left plays fifths on A and G. The right hand comes in with ; K L ; K ; L K H ; L K J. For a moving bass line during the melody, the left hand plays F A F A G S G S. The right hand then plays H J K L ; K L ; K ; K L ; K L ; K L ; K ; L ; L K. Then there’s a switch to G H K L G K L G K L G K L G K L J A J. A chord comes in with A D K ; and then the left hand bass is A G (x4) F A (x3) S H (x2) A G (x2) F D S A G. A D K ; is the final chord.

Here is the final result

http://www.google.com/webhp?hl=en&tune=IBBQIQkgVFCOUEIQRSjlEqEEEo4RCgFFKEESoBQQhFAqOEQJApQSjhEqGEIVBQISkgVFCOUEIRSCiQhEqEQUw4wCUkChCYBUUIRQShhEJKUMIlRAgjCKQUSEJIFRQjlHGIEAgJhKkRFBCJUgYoIRKkhFBKJEhIYFRAjlCGMIhggA

yea, I would not go on stage with this, but still.  Pretty cool.