Vonage disclosed that AT&T filed a patent infringement lawsuit against it, the third major telecom to do so.

  A bill would give telecommunications companies legal immunity for aiding the government's warrantless wiretapping program but leave them vulnerable when it came to any aid they offered previously.

  The Nasdaq tumbled 2.7% Friday, as broad economic concerns pressured the markets, and tech giants like Microsoft, Dell and eBay swooned. Google was a rare bright spot.

  Yahoo's marketing chief is leaving, the latest executive to depart since the search giant began a broad reorganization.

  WiMax received an endorsement from a United Nations agency, raising the odds the wireless Internet technology will be widely deployed.

  KDDI said group net profit for the July-September quarter rose 5% from a year earlier, as steady gains in its cellular business helped overcome bigger losses in its fixed-line operations.

  Xerox's profit dropped 53% from a year ago period that was boosted by a tax gain, but sales rose 12% on demand for color printers and office services.

  Village Voice Media's leaders were arrested after running a story about grand jury subpoenas they received seeking reporters' notes and information on who visits their Phoenix weekly's Web site and what they do on the site.

  Wipro said U.S. demand for outsourced software and IT services remains strong, as the Indian firm posted an 18% jump in profit and forecast more growth.

  Alltel's earnings jumped 51% as the wireless operator added 205,000 net subscribers in the final quarter before it is sold to private equity investors.

  An identity-theft study found a diverse range of offenders and methods. Many cases involved sloppy data-security practices by businesses.