Transition from single celled to multi cellular

[TheDeafPianoTuner]

Listen to a TED talk by Bonnie Bassler called "How Bacteria Talk".
Her research concerns cell-to-cell communication, and it sheds light on how cells can organize and specialize to become organisms. I totally geeked out when I discovered her, she's my hero.

Thank you! That video was fantastic. 

I am starting slowly to get the picture, but what I would like (if it's out there) is some theory on the different stages that might have happened.

Edit: You know I feel kinda stupid now... I kept looking at these obscure articles but the wikipedia page on multicellular organisms has a nice break down of the different theories lol XD Reading up on that now...