I just bought a touchscreen so I'm still working with it.
Imagine using only the left mouse with you program.
No right clicking and no keyboard.
I have one problem. I can't exit the screen saver with the mouse/touchscreen. Did I miss something in the config?
Now on to some suggestions. How about some extra programable buttons on the screen. They could be programed/assigned any task such as next song or clear Que. Another one would be to have one button to pop-up a control screen which might have the next/clear/View Que and some other features.
Don't take any of this the wrong way you have a great program here. I works great on my non touch Juke 
But, do you still want the EXISTING keypad? I'd hate to do more work than is required with this

As for programmable keys, I can see what will happen. As a software developer, it's hard to come up with rules. The second you put one in place, someone / something wants it broken. So, I could put in 5 programmable keys, then someone will want 6.

I had an experience recently where a customer requested more room in a certain field, so I doubled it. They had the update for a day until such time that they needed 1 more character that was allowed in the new version

I'm not really sure what to do with this, but let me look at it over the weekend (but don't stop giving ideas on how it can be improved, please!!!)
As for existing the screensaver using the mouse, that was causing me problems when I first did it. I believe the problem was that I was trying to make it exit with a mouse movement, but the program kept getting 'told' that the mouse had moved, even though it hadn't. I should be able to make it close with a mouse click, though!