I know of a few couples who got married on 10/10/10, though I didn't hear of any 11/11/11 weddings (now THAT's a cool wedding date) because it unfortunately fell on a Friday. Any of these triple numerical wedding dates definitely makes remembering anniversaries easier - at least for the couple.
One of my friends, who got married on 10/10/10, told me that a family friend called his parents to get their phone number so she could call the couple and wish them a happy first anniversary the year after they got married. His parents told her she already missed it by a month - and she looked at the calendar to discover to her embarrassment that that day was actually 11/11/11.
Next Wednesday is also the 4th day of Chanukah, and 4 x 3 = 12! I had to find a Jewish connection somehow.
So, is anyone you know, perhaps you yourself, jumping on the 12/12/12 let's get hitched bandwagon?