After Paul's talk at the workshop I downloaded Processing. I looked through examples on the web and in the software itself I found some very interesting ones that may come in useful for a project. They could be tweeked, joined with other code ect to create something useful for a project. I thought it was a good idea to practice using it now, because if something came up that it could be used for then i would have an idea if it could be done or not.
Here are some screenshots of examples of what it can do..

This one adjusts the brightness where the mouse is and lights up that part of an image

Here you can use the scroll bar to move the image
position

I thought this was a cool way of displaying text

This was in the drawing category, it would draw circles depending on where the mouse is and its speed

I loved this one, you move the cursor to the word tickle and it jitters and moves away from you.
I think processing would be useful for doing a project with human interactivity, it seems simple to use and there are a lot of existing libraries and examples to work from.