I am not here to show of my own project, rather talk about someone elses
Im into paintball, and I found this awesome open source project on the net called "Project Sentry Gun".
Its a autonomous gun that tracks motion on a webcam. The webcam data is processed by processing and then controls the turret via a arduino.
You can find it in this link:http://sites.google.com/site/projectsentrygun/home
The bloke working on it Bob Rudolph is spending alot of time on the project.
Im hoping someones interest is stirred now, so he could get some help coding this project.
The motion detection could use alot of more advanced filtering features,
and dont have target movment prediction.
Edit: It now has a target movement prediction system!!! yay
Thats why I am sharing this with fellow arduino developers.