Since resting your fingers on a flat surface is going to be the default state for most users (and less straining on the arms) you might want to experiment with an inverse mode where lifting a finger is a keypress and lowering it back down is a release.
Now the Leap is out can i try this somewhere :D
I'd imagine that you can keep the fingers touched down, and only register touches, which means lifting and releasing the finger.
so when does it release??? i need this :)
@bencruziii