This melts my geeky heart. :) "The numbers letters in each word in each vow matches the consecutive digits in the decimal expansion" of Pi, or Phi respectively. The husband's Pi vow is:

Now, I give a total offertory to joyful union.

I'll honor - joyously, endlessly, loyally, devotedly - you.

In the marriage that unites us, paired Yang and Yin, Benjamin and me, forever soulmates, shall complement as partners steadily.

With a doubtless promise, I pledge integrity and stability sincerely. Our rounded rings, a completely noble treasure; it represents continual respect, love, perpetual link with trust, limitless.

My vow: absolutely lasting devotion.

Boing Boing: Hackers' wedding vows based on Pi and Phi