I'm betting the math geeks really rock it in four years, when the date is 3/14/15. Don't know how "math-y" I am, but I will certainly be glad to eat a piece of pie today. And I won't even care about the ratio of the pie's circumference to its diameter.
Unfortunately, we already missed the chance to celebrate E Day (February 7) or Golden Ratio Day (January 6). But there's always next year!