Someone mentioned this thing in the knife forum:
Illuminated Microscope - RadioShack.com
I have to say the image is pretty amazing for only $12, and this might make a good tool for checking sharpness and magnifying suspected blade problems. It has a 60x - 100x zoom, and the image looks pretty good even at 100x.
FYI, I don't own a Radio Shack or anything, I just thought this was pretty cool.