MIDIsense is a nice MIDI input device, that let you use all kind of sensors as midi input. Check the Website.
Now the Application (MIDIsense Software) was quite unpleasant, because it crashed here and then and was quite slow and CPU intensive. As this Software is OpenSource I downloaded the latest CVS code and compiled an uptodate version, including the latest wxWindows and portmidi libraries. Now the Application works much better and faster.
Hint: This is just a quick hack, which worked fine for me. There are NO DEBUG messages available!