Ok, so I'm a bit of a geek when it comes to data. Or at least I am when it comes to turning it into pretty pictures, ever since being introduced to Tufte's 'Envisioning Information' in my second year of architecture school.
Nicholas Felton, the creator has mapped all his 'meaningful interactions' with other people over the last year by giving them a card with a unique URL via which to log that data, and then has compiled and disseminated it all through some striking graphics into what I think is his fifth annual issue.
For others similarly afflicted with a visualised data fetish, I guess you'll already know OMA/AMO, but maybe you don't know their little cousin REX yet? Also check out the Datablog on the Grauniad website.