At present I use it with my S900 because it is placed far away in my set up and I use more Yamaha styles (because there are plenty). Besides Yamaha receives 32 midi IN channels allowing me more connections. But of course you can use it with Korg or any brand arranger too (it's a Korg product).

Trident:
Those are nice controllers and the best thing you don't need a computer. But you can buy around 5 Nano for that price.

Does anyone know a midi or usb programmable foot controller? Or a Midi/usb hardware/software to send simultaneous program change messages in different channels by triggering one button?

Victor