Term used (mostly with heavy irony) to describe people working from their laptops in public places. The term did not exactly catch on, but the idea is that a techie elite roams the city, or the world, freed from the office by laptop plus wifi.
Here are some good places to be an "urban nomad" or to spot one:
Also called "bedouin," and also not a popularly-used term.
Note - this really needs a better word. The phenomenon is real, but does anyone actually use this word??