Utne magazine (don't call it by its abandoned name of "Utne Reader" has a great piece on "Subversive Gadgets."

Depending on your view of sociopolitical networking as guerilla theater, most of the six spotlighted gadgets have the potential to stir things up or cause disruption.

I'm talking about devices such as the:

Magicbike Wi-Fi Bike, which can act as a mobile hot spot and command post for rally participants who are toting around their own Wi-Fi enabled mobile devices;

Rocket Crowd Counter, which works by means of a model rocket that flies above an assembly of people, shoots a photo of the crowd with a built-in video camera, and then can send pictures back to ground-based laptop devices equipped with head-counting software.

Don't want to give away the store. Here's a link to a page on the Utne site where you can purchase the full article