January 4, 2005 THAT James Stewart will focus on the mainstreaming of porn in a “60 Minutes” segment tonight when he interviews Timothy Greenfield-Sanders about his book, “XXX: 30 Porn Star Portraits,” and Jenna Jameson’s “How to Make Love Like a Porn Star” . . . THAT Malcolm Gladwell will launch his book, “Blink: The Power of Thinking Without Thinking,” Tuesday at Elaine’s with a party hosted by Fast Company magazine, which put him on the cover . . . THAT Karl Rove, the political guru behind President Bush’s re-election, will be honored by the Congress of Racial Equality (CORE) Jan. 17 at the Hilton.