Here is an interesting USB Gadget to wet your appetite, its the e-Supply EEA-MAN1011 digital USB Microscope. It features a 2 megapixel sensor which was manufactured by Sanyo Japan that offers a 5x to 150x zoom.
The e-Supply EEA-MAN1011 digital USB Microscope will work with only PC (no Mac) and features LED lights for use in dark areas such as oral and ear examination. The EEA-MAN1011 digital USB Microscope can be found in Japan for a price of 12,500 Yen