Puzzle In xkcd Book Finally Cracked
An anonymous reader writes "After a little over five months of pondering, xkcd fans have cracked a puzzle hidden inside Randall Munroe's recent book xkcd: volume 0. Here is the start of the thread on the xkcd forums; and here is the post revealing the final message (a latitude and longitude plus a date and time)."
Indeed. Having read the thread, I suspect I've just witnessed a mathematical game of Mornington Crescent.
So, this is obviously an invitation to another party.
Or a trap.