Where is there documentation on the Level 3 binned data format?

Basic OBPG web information: http://oceancolor.gsfc.nasa.gov/DOCS/ocformats.html#5

The OBPG L3 Binned data format document:
http://oceancolor.gsfc.nasa.gov/DOCS/Ocean_Level-3_Binned_Data_Products.pdf

SeaWiFS Technical Report Series VOL. 27 - Case Studies for SeaWiFS Calibration and Validation, Part 3:
http://oceancolor.gsfc.nasa.gov/SeaWiFS/TECH_REPORTS/PreLPDF/PreLVol27.pdf

SeaWiFS Technical Report Series VOL. 32 - Level-3 SeaWiFS Data Products: Spatial and Temporal Binning Algorithms:
http://oceancolor.gsfc.nasa.gov/SeaWiFS/TECH_REPORTS/PreLPDF/PreLVol32.pdf

IOCCG Report Number 4, 2004: Guide to the Creation and Use of Ocean-Colour, Level-3, Binned Data Products: http://www.ioccg.org/reports/report4.pdf

Some ways to access L3 binned data: http://oceancolor.gsfc.nasa.gov/forum/oceancolor/topic_show.pl?tid=1920

Binning vs. Mapping discussion: http://oceancolor.gsfc.nasa.gov/forum/oceancolor/topic_show.pl?pid=4447

The OBPG L3 SMI data format document: http://oceancolor.gsfc.nasa.gov/DOCS/Ocean_Level-3_SMI_Products.pdf