The Great Connection
From Halopedia, the Halo wiki
"The Great Connection" is the fourth episode of the Halo 3 Alternate reality game Iris.
The fourth episode began with a strange equation from the third server, and a strange poem was posted onto Halo3.com by a mysterious entity called "When We Two Parted". This poem was modified to read "CASTAWAYTHEORYVOLMAN" which lead users to find a book named The Castaway Theory with the equation matching the one from the third server. In the book's forums, a close friend of the author indicated that the author went missing a while back, and over the next several days the friend indicated the author had returned and had given a way for people to talk to him. This led the author to link to the fourth server. The fourth server went over the Conservation Measure and pondered the mystery of the Flood's origins.
Server 4 opens at Halo3.com on August 9. Many strange things are found, such as hidden buttons, and "light halos" around certain buttons as well.