The original September ’09 Scientific American article is here, and important in itself, but not as important as someone holding hands with the non-physicists who want to know more of this topic.

Quantum Entanglement, Photosynthesis and Better Solar Cells: Scientific American

A May ’09 article with more detailed thoughts from Foresight.org is here:
the Foresight Institute » Quantum entanglement in photosynthesis?

A pdf of the original Berkley article:

Quantum entanglement in photosynthetic light harvesting complexes