The effort to invade some innocent wifi cafe continues. Tailrank creator Kevin Burton wants to run a "San Francisco Wifi Bedouin Flash Mob" (which would make a great electronica collective name). Basically, a couple dozen people descend on a wifi cafe, making a show of purchasing power and feeling trendy while doing so.

So this is how skateboarders feel when some hotshot blows up their favorite grinding spot.

Last year, San Francisco became America's most wireless-saturated city, with 801 public hotspots. Nearly every cafe in the city turned into a wireless workplace (Ritual Roasters, for example).