Point and Shoot Macro--Best Camera?

After reviewing how much my medical office spent this last year on Polaroid film, I am thinking about buying 3-4 identical point and shoot cameras and a business inkjet or smaller color laserjet to replace the Polaroids. I'm a dermatologist, and our office is constantly taking pictures of moles, rashes, etc.

I need a point and shoot that can do reasonable close ups, with good flash coverage. Ideally, they would work without adjusting the aperture, and without needing to go to manual focus (though having that option, if needed, would be great).

These are chart note photos, so the quality needs to be good but not great. Some of the employees using them are "technology shy"--I've tried to get them to use my Canon Eos 20D, macro lens and ringlight flash--no dice. Also, these cameras will be left somewhat unattended--so they ideally would be cheap enough (say under $400) that it isn't a huge issue if one develops legs.

Any thoughts?