I am pleased to announce that I have a new item in the store. It’s a PT2399 controller called the Taptation written by The Tone God. (Updated 1-24-11)
Here is the data sheet: http://www.thetonegod.com/tech/datasheets/taptation.pdf
Application note: http://www.thetonegod.com/tech/datasheets/taptation_pt2399.pdf
The kit comes with the controller and a digital potentiometer so you can start using it right away.
Thanks to The Tone God!