I know that some of us are still waiting for the Kemper footcontroller. I'm sure it will be available someday. I'm also sure that this will cost us a lot of money (again). In the meantime I see a lot of you using the Behringer/Uno option. I'm sure this is a good and cheap alternative. For me the Behringer is too large to carry around and it could be even cheaper...
I recently finished my DIY project which is building my own MIDI footcontroller. Based on an old Boss FC-50 and an Arduino board (which is a programmable microcontroller). I have dedicated a website to this project. You will find the details here: http://www.pekenverenmediaproducties.nl/projects.
My controller is small and cheap, but can do more than some of the commercial products. Maybe a bit too complex if you don't have programming/electronics skills. But too my opinion this project was not too complex.
I hope this will inspire you!
[Blocked Image: http://www.pekenverenmediaproducties.nl/projects/wp-content/uploads/2014/03/smallFC50Mod.jpg]