For whoever is interested, the Casio EP-10 shares the same same amazing chip (NEC D1867G), as Casio’s calculator/keyboard flagship VL Tone &amp; many offshoots in the PT family as the VL series.  The EP-10 is the "Muppet Babies" model.  I bought one off of Ebay today for $9 bones.  Thought that might be useful to those who dont want to spend $75-$150 for the VL-1.

Here is a demo of the muppet babies circuit bent.  Good sounds.  http://www.youtube.com/watch?v=gA7FJqXKOE8 

laters