kdawson from the be-there-or-be-somewhere-else dept.
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)."
I've never been canoeing before, but I imagine there must be just a few
simple heuristics you have to remember...
Yes, don't fall out, and don't hit rocks.