WSJ.com - Microsoft May Mount Challenge To Security Software Makers "Microsoft has created a security business unit to spearhead the expansion of its limited roster of security products, according to a person familiar with the unit and an internal document. New products could encroach on leaders in the field like Symantec Corp. (SYMC), Network Associates Inc. (NET) and Internet Security Systems Inc. (ISSX)." Can this be a surprise to anyone?