"The United States is at war with a foe that is, as the cliche has it, "a shadowy terrorist network," a multinational private army whose nodes and lines of communication reach invisibly and murderously across national borders. It's centipedal, multiheaded, hard to find, difficult to kill. Don't be fooled by familiar-seeming before-and-after images of bomb damage or shots of jet fighters streaking off the decks of aircraft carriers: This is a new kind of war -- netwar."

When a Thai engineering professor announced that his students had created the "world's first armed robot guard," controllable via the Internet, the global scientific community shuddered in unison. Its inventors, however, swear it's a useful security device.

Erick Schonfeld argues that despite the concerns of privacy advocates, the technology of implanting medical chips into the human body "is already more helpful -- and more common -- than you might imagine."

Until now, holograms have been little more than second-rate gimmicks, thanks to the fact that holographically creating anything more than small, washed-out images has proved exceedingly expensive and time-consuming. But that's about to change.

Business 2.0 covers the growing market for online role-playing games.

Soon, researchers say, they'll be able to pick off Scuds, deter ICBMs, and make terrorists glow like Japanese lanterns. Someday the technology may also come in handy on the factory floor.

Business 2.0 covers the booming commercial space industry, focusing on space tourism, space launch startups, and the space elevator project.