But smart people are working on it, and they're making progress. Here are some camera products and projects that constantly capture images.

A company called Oxford Metrics Group (OMG!) plans to ship a $650 camera next month called .

The camera is designed to be worn around the neck, and make its own decisions about when to snap photos. It uses acceleration, direction, temperature, proximity and light sensors to make those decisions. So, for example, when you're just sitting there, and the scenery isn't changing, it stops taking pictures. If you get up and walk around, it starts again.

The camera has a near-fisheye lens (136-degrees), so it captures a lot of visual information without aiming or pointing.