This morning I sent out mail to the people I'd been talking to, asking them what sorts of things they want to learn about. The general consensus is that they want to learn the basics of photography-- aperture, shutter speed, depth of field-- and how to use their cameras to control this stuff.
I'm a bit of an untrained hack of an amateur photographer, but I've been shooting up a storm with my dSLRs for the last couple of years, and I started using film SLRs back in high school... back when they were manual-everything. I definitely know the difference between an f-stop and a shortstop, and I can tell you what to do to the camera to freeze that shortstop mid-catch. Plus, the best way to learn something is to teach it, right?
This will either be painful or fun... I'm not sure which.