I am a doctoral student that works quite a bit with rare books and microfiche of rare books. I have tried the project-the-image-and-then-photograph-the-projection method, and though it may work for some on a tight budget, I was working with very fine print (think size 6-8 font on the original page that was a full folio of about 16 x 20 inches; this is a two page spread so the original image was huge and there is loss in quality for the reduction to the microfiche image alone), and that was not a satisfactory option for me.
One way that I found to do it started when the college library got rid of an old Bell Howell microfiche reader (similar to a ABR VII). I took the top off using a swiss army knife and used the base; complete with tray, stage, lighting, and so forth ... by the way I had to use an opaque filter of white paper or such over the light so that the camera would focus correctly. You can find these sometimes for 50 bucks or so online. I then used a manfrotto articulating boom (dual rail system) with clamp to an overhanging shelf or to the counter top. I have used the Canon Rebel XTi and XSi with a 60mm macro lens to very good effect. For good measure a 12 or 25 mm extension tube will help with much smaller fiche sizes. The fiche images I was photographing were somewhere between 12mm x 16mm. With the extension tubes I can photograph 8mm x 10mm. You will also want a remote of some sort to fire the camera. As you can imagine with macro photography, vibrations in the camera or on the countertop will affect your shot dramatically. So stabilization is an issue, though not insurmountable. As to speed, with the auto focus, I can snap a fiche of about 50 images with high quality in about 3 minutes. If you think in a five cent per copy sort of way, you will break even after about 200 slides of fiche for the lens and boom stand, or about 10 hours; if you include the camera system, call it about 30 hours. For me it was an issue of finding old articles and reference entries for the dissertation without having to keep track of so much paper or spending all day on a painstaking fiche scanner of one image every 15 to 20 seconds (who has that kind of time?).
Oh by the way, if you have some sort of live view option (standard on Canon XSi and higher) then it may go slower, but you can easily control the camera with a computer, and then the space bar functions as your firing mechanism. Also, I would highly recommend getting the AC/DC adapter for the camera so you don't have to lose your composition when you change the battery. . You can go with a manual bellows and the kit lens, but gravity is a cruel mistress and the bellows will creep over time. Also, you lose autofocus and aperture control. Same goes with the lens reversal trick and ring. If you stick with the Canon extension tubes (yes they are more expensive than others, but you are guaranteed to retain communication with the lens, other extension tubes may not) and a macro lens, you retain full lens control, which is the primary determinant of quality and speed.
the 60mm lens: http://www.amazon.com/Canon-EF-S-Macro-Digital-Cameras/dp/B0007WK8KS/ref=sr_1_2?ie=UTF8&qid=1306633246&sr=8-2
That's one approach