Sky and Telescope's Occultation Page
List of events and information on their causes. Also features tips on recording with a camcorder.
http://skyandtelescope.com/observing/objects/occultations/

International Occultation Timing Association (IOTA)
Provides predictions for grazing occultations of stars by the Moon and predictions for occultations of stars by asteroids and planets, information on observing equipment and techniques, and reports to the members of observations made.
http://www.occultations.org/

Occultation Section of the Royal Astronomical Society of New Zealand
Information about different sorts of occultations, and how to contribute useful scientific results by observing them.
http://occsec.wellington.net.nz/

A Memorable Occultation
Dave Scherping of the Prairie Astronomy Club relates his experience.
http://www.prairieastronomyclub.org/occ2.htm