Math geeks and school children everywhere are wishing each other a Happy Pi Day today: that's right, it's March 14th, or 3/14, the first three digits of the mathematical constant π, which represents the ratio of a circle's circumference to its diameter. (Math geeks everywhere are also scoffing at the Saganian/Aronofskian notion that the numbers in pi reveal some esoteric, kabbalistic secret, while those school children are all happy just to be measuring and......