Here's two for steampunks, inconspicuous time-travelers and pimps: a cane with a concealed telescope, and a hip flask containing a USB hard drive instead of whisky.
Iomega's leathery eGo hard drive is $142.50 and has 250GB of space. According to the specs, it requires a single USB port–many similar drives require two due to SATA's power requirements.
The Hammacher Schlemmer cane comes in at a surprisingly cheap $90. Cut from a 37-inch shaft of African rosewood, it offers only 3X magnification, but infinite magnification of your geek élan.