Approximately 1500 of the 6000 sites used in this new paper are from the Reef Check database.
Bruno JF, Selig ER (2007) Regional Decline of Coral Cover in the Indo-Pacific: Timing, Extent, and Subregional Comparisons. PLoS ONE 2(8):e711. doi:10.1371/journal.pone.0000711
Press release: http://www.eurekalert.org:80/pub_releases/2007-08/uonc-icr080207.php