One thing that always was a little disappointing about Touchkeys, was the lack of X axis control on the upper bounds of the white keys.
I mainly use this for pitch bend waggles. It's great!
I stumbled across a work around for the lack of control though, with a different sort of gesture. When playing a key with any finger on the upper part of the white keys, your thumb is sufficiently lower down to touch the lower part of the white keys, and do a pitch waggle.
The graphical keyboard reflects that you are doing this too. But, the Touchkeys software does not send X axis info when you do this. It displays X axis movement graphically, but my MIDI monitor shows nothing.
If when you slide your finger up a white key, and X axis control is no longer available for the first finger, instead the software sent X axis MIDI info via the second finger touch on the same key it would be ideal! :)
A new feature suggestion! :)