Silverback is described as “guerilla usability tests” by its makers Clearleft, it allows you to use a mac and the app to record the user onscreen movements as well as their facial expressions using the built in camera on your mac. Its pretty incredible, for $49.95 and you can try it for 30 days for free. It auto highlights each click and allows you to review user activity and movements. I think its a great way to introduce to your team or clients to the ability during testing or focus group testing to also record inexpensively the movements and use the test data to help perfect your web site or product. Check it out at http://is.gd/12wf
Quick overview of what it does and how it works.