. . . . "He said that in six years at I.B.M. he can recall only one time when he asked a co-worker not to take a long weekend off -- when their group was about to buy another company -- and that calling colleagues or checking e-mail while visiting relatives in Texas or Illinois is a fair trade for being able to work from home so he can spend more time with his children, Alec, 5, and Evia, 2." .