RIAA turns up heat on file-trading at work. The latest salvo against companies came last week, when the Recording Industry Association of America (RIAA) sent letters to about 300 companies providing evidence of specific instances of their internal networks being used to swap copyrighted songs, and warning of potential legal liability. The RIAA for months has been pressing companies to crack down on the use of file-swapping networks. – from CNET News.com