USB MIDI Expression Pedal
Stay tuned for the USB MIDI Expression Pedal Kit that allows to convert a common musician's Volume pedal into an USB MIDI Expression Pedal supported by all OS and music software. Now, you can play that Jimi Hendrix riff without extra hardware! All you need is a software guitar simulation such as Apple's GarageBand, IK Multimedia's AmpliTube, or Native Instrument's GuitarRig.
... coming soon.