I have no daily practical use for microscopes, but they bring back warm and fuzzy memories of dissecting critters and smearing onions (did you know you can still study Alchemy?). Thinkgeek is selling a USB microscope. Haha. A USB Microscope! Why the USB connection, I don't know, maybe it lights up.
In fact it does light up. And it zooms. And you can film what you're fiddling with, using software that ships with it. That's pretty cool, alright.