The diplomatic standoff over the collision of a U.S. surveillance plane and a Chinese jet fighter may be over. But hard feelings still linger in cyberspace.
On message boards and in e-mails, angry Chinese commentators plot revenge for the death of pilot Wang Wei. They encourage Chinese loyalists to take to their keyboards and strike at U.S. Web sites

For much of its life, the Internet has been seen as a great democratizing force, a place where nobody needs know who or where you are. But that notion has begun to shift in recent months, as governments and private businesses increasingly try to draw boundaries around what used to be a borderless Internet to deal with legal, commercial and terrorism concerns.

Researchers are developing "chatterbots" that are renewing debate about the extent to which computers can achieve intelligence. The electronic personalities of this generation use the vast repository of information on the World Wide Web as their memory bank, not just some rigid database.

Space policy experts debate the merits of NASA's increasing emphasis on promoting commercial microgravity research on the space shuttle and space station.