Pi is also an acceptable two-letter word in Scrabble, as are the names of all letters.
http://www.baltimoresun.com/news/local/bal-md.vozzella12mar12,0,2669856.column?coll=bal-pe-maryland (last item)
It's pi, no matter how you slice it
by Laura Vozzella, Baltimore Sun Staff Writer
If you have a soft spot for infinite decimals or transfats, have a slice of Pi Day at the Maryland Science Center. It's this Tuesday, March 14. (3/14 - get it?)
How in the world do you celebrate the ratio of the circumference of a circle to its diameter? By serving school groups Tastykake snack pies, of course.
Visitors also can help create a Pi Chain, a series of interlocking links that represent numbers in the never-ending sequence. And they can sign a petition asking the U.S. Postal Service to designate Savannah, Ga.'s ZIP (31416) the "official ZIP code of Pi."
