Tool for Tones

I've looked around and can't find a good tool to practice tones.

The funny thing is, I've seen one in a bar in Budapest (or something similiar)! It was a karaoke machine that tells you how close you are to a note and gives you points for singing New York, New York on key.

Now if some wise programmer folk were to adapt that karaoke thing to make a simple downloadable app that checked and visually SHOWED you if you were doing tones right, I bet they could make a pretty penny.

AND If you could download your cPod vocab or lessons into it, I bet that would add a nice new market advantage to the cPod Toolkit. (do I need a hint, hint here?)

You wanna cash in, I wanna learn tones!

Just let me know when the beta is ready.