Thanks to Jennylee over at the Fuselage for this information.
Puzzle #4 of the series was just released, allowing for ingenious puzzle makers to finally construct the spoiler information the puzzles were said to include. You can read all the work that went into it on Lostpedia.
Here are the results of the decoding process
These are read from the upper left corner of the map, in a clockwise direction.
THERE IS NO SICKNESS NEED MORE MAC AND CHEESE PERIODIC RESUPPLY DROP ALVAR HANSO WHAT GOOD IS PEANUT BUTTER AND CEREAL WITHOUT MILK QUARANTINE IS A HOAX DHARMA INITIATIVE HANSO GROUP CERBERUS VENT EMERGENCY ESCAPE PROTOCOL
The underlined text (decoded from the corresponding underlined code) corresponds to abbreviations seen on the blast door map notations, which were previously not fully explained. This decoded message clarifies that shorthand.