Equifax said a laptop computer containing employee names and Social Security numbers <A HREF="http://www.eweek.com/article2/0,1759,1979296,00.asp?kc=EWRSS03119TX1K0000594">was stolen from a worker</A> traveling on a British commuter train. The May 29 theft affects nearly all of the Atlanta-based company's nearly 2,500 U.S. employees, aside from those hired in roughly the last two months, spokesman David Rubinger said.