I recently helped an RCA MA Product Design student with her final project -

Louisa Stathopoulou built an interactive bench. (see we-make-money-not-art review)
When you sat down on the bench you could leave 'virtual' messages via a touchscreen which would then be projected onto the bench next to you along with previous 'sitters' messages.

She had started developing the motion tracking using 'Processing', and she hit problems and was put in touch with me by one of my ex St Martins students.

I have to admit, even though I enjoy the flexibility of programming in C & C++, I was very impressed by the Processing environment. Especially because of its easy transition to web based work.

Watch this space as I'm going to convert some of my webcam based artworks and publish on this webblog!

3/8/05 - actually, I won't be using Processing to do webcam based weblets as you can't access the camera via Processing. There appears to be an additional plugin for java which uses TWAIN (which did you know stood for Technology Without An Interesting Name!!!!) but this wont give proper live access to the camera. So it looks like I'll have to write a Director xtra.