Making this possible is the open-source firmware QMK, which is the same stuff powering Ploopy’s line of modular mice and trackballs. The firmware lets you easily reprogram gestures, tweak tracking speeds, and even add entirely new functionality through coding.
I would love to get one. Really like the option to have gestures and in general the work with a trackpad. Sadly its from canada and getting it to europe will be expensive.