Film Festival Today: A magazine that covers the film festival circuit. Includes call for entry notices, festival calendars, interviews, previews, reviews and articles from experts.
Film Insiders Digest: Focus on Film Festivals: Details on various international film festivals. Candid interviews with festival directors, actors, directors, and producers, as well as highlights on selected films [requires Flash].
The Onion AV Club: Park City 2000: Keith Phipps' article examining the merits of several popular film festivals.
Withoutabox.com: Online application submission service for film festivals. Commercial service with free trial. Background information and FAQ.