I got an e-mail earlier today from American Mensa asking me to renew my membership online now so they could “be green” and not have to send me a notice in the mail later this month. It was apparently a generic message that they send to all members since I scrolled down a little further and discovered that my membership will expire on 3/31/2013 (I apparently paid for three years the last time).
Thus, if the Mayans were right and the world is going to end in 2012, my membership in Mensa is ensured for the rest of my life.