Jazz Fest Grids - ALL of the shows in one place.
Swagland - A guy named Swag put this incredibly comprehensive guide together with so much info on attending Jazz Fest.
We've run the numbers and it is actually cheaper to just move to New Orleans instead of coming back and forth for Jazzfest year after year. Also better for your constitution, according to a Dr. we know. Here's a list of guides with tips on moving to New Orleans.