We caught but a few brief glimpses of it in Episode 1, but intrepid folks on the internet have put their socially outcast heads together and created a discernable image out of that mysterious
Dead Prez poster I-Ching logo.
The yin-yang is a swan, and the word reads "DHARMA," or perhaps (if, as indicated by the possibly backwards "R," it is
a mirror image) "AMR-AHD," an acronym that supposedly has some sort of military or
medical or magnetic connotations, but which I am far too lazy to look up.
I like "DHARMA" better anyway; it feels good on the tongue, and is redolent of avocados and alfalfa sprouts and bad bumper-stickers and even worse sitcoms. Say it with me, "DHARMA," and Jenna Elfman is too adorable to get mad at as her flakiness screws the pooch yet again. "DHARMA," and
Alan Rachins is a creepy and stoned pervert in a VW Vanagon. "DHARMA"and your kind of hot yoga instructor just farted.
"DHARMA."
Post-Episode 2 Update: The symbol was seen quite clearly on the hatch wall, as a breast insignia on Desmond's Dickies, all over the pantry, and was even (in a similar form but with only a simple black line where the swan and letters should be)
on the shark's tail.