In 1897, Indiana tried to regulate Pi.

Actually his "discoveries" didn't just claim that pi was 3.2, it claimed (sometimes implicitly) several values. The wikipedia article is more informative:

http://en.wikipedia.org/wiki/Indiana_Pi_Bill

Google finds many more references of varying detail.

Most people know the approximation 22/7, and many people actually think this is the exact value. A much better approximation is 355/113, unreasonably good, as evidenced by the unusually large integer in the continued fraction expansion of pi.