If you're interested in the how to's of microscope photography, have a look at http://www.krebsmicro.com/ You will also find a few of his images in other galleries on the nikon small world website.
When I was at the lab I so wanted to come up with something cool to enter in Nikon's Small World contest. I spent at least a couple of hours every day (and sometimes all day) looking at stuff through microscopes of various types. The ones that win the contests are way cooler than anything we looked at as part of cases, though. I miss the microscopy part of that job.