See a great compilation of information regarding the Santa Monica Farmer's Market tragedy at LA Blogs, including a memorial service Saturday, July 19th, 2003 at 12:15 PM, Santa Monica Farmers Market victim assistance fund set up by the SM Chamber of Commerce, and info on crisis counseling.
A prayer vigil will be held at St. Augustine's on July 19th at noon also.
LA Times has provided the most extensive coverage. For local newspaper coverage: Santa Monica Daily Press (warning: you'll have to download Adobe to read the paper from the archives-June 17, 2003, June 18, 2003) and the Santa Monica Mirror.
Eerie: the LA Weekly has a write-up by Michelle Huneven about the Santa Monica Farmer's Market apparently written before this terrible accident (note: Although I don't always agree with Phil Carter at Intel Dump, he shares his thoughtful analysis of this "incident" here).