Sebastian Korczak likes to hook up gear to Blender. Check out his latest experiment: Blender Live Shape - a real-time displacement modifier (similar to normal map) based on live grayscale video from webcam. Read on for more of his work.
For years I'm interested in Blender but this year I started to make some electronic project connected with Blender. Probably you like to see my concept of real-time 3D object in Blender controlled by webcam (I called it: Blender Live Shape :])
I use Processing for capturing webcam and generating greyscale images. There is subdivided plane in Blender with displacement modifier. Python script periodically replace modifier texture with new image. Virtual serial port pair make synchronization. At last we receive object with real-time generated mesh. It works in Blender standard mode and in Game Engine. All source code is on my project website. I think it's possible to use some python libraries for capture webcam direct to Blender.
Soon I'm going to make 3D scanner using webcam, Processing and Blender.