I'd like to create an interactive media experience powered by Ubuntu, incorporating projected video, music, and assorted strange input devices. Has anyone used Ubuntu to orchestrate something like this? Can you recommend any specific software/hardware?
Here are instructions for getting Ubuntu to detect a Wii remote, which could easily be hacked into an artistic prop or some inconspicuous object.
You could use Motion to detect the movement of people walking through your installation.
I haven't used it personally, but here is an interesting DIY project for an automated NERF turret, which detects a moving target, tracks it, shoots and plays sounds.
Are you talking about setting a machine as a Media Center / DVR (Digital Video Recorder, aka PVR)?
Here are three interesting solutions for this: