"Yahoo today announced the launch of what is expected to be the world’s largest time capsule in history. Starting today, Yahoo! is encouraging people from around the world to contribute personal photos, stories, thoughts, ideas, poems, prayers, home movies, music and art to an online anthropology project designed to celebrate and understand life and global culture in 2006. Content from the time capsule will be broadcast directly onto the 216-foot tall Pyramid of the Sun in Teotihuacan and sent into space through a light beam from the historic monument."
-- press release
By the way, I had no idea there was an entire industry making and servicing time capsules.