People are starting to notice that July 7, 2007 is a cool date. Reporters are taking note, as the numerology-mined set plans for “lucky” weddings or trips to Vegas (or both). Here’s a story in today’s Detroit News on travel options. The date also happens to be the 100th anniversary of Robert A. Heinlein’s birth. Hard-core SFers will be in Kansas City, for the RAH Centennial.