I just posted a video of the PID controller in the DyIO. It lets you select an input and connect it to an output with a built in real-time controller that runs on the DyIO itself. This allows for closed-loop motor control, high speed reactions, or even a simple line-following robot (a special case where you can use PID to solve the problem). It has 8 independant channels, so you cna link 8 different inputs to thier respective output.