Kashrut.Com 
A Kosher information source on the internet for the kosher consumer.
http://www.kashrut.com/Kosherfest
Annual trade show for the Kosher food, ingredients, equipment, and food service,
http://www.kosherfest.com/
Kosher Basics
The how and why of keeping kosher, in a step-by-step "wizard" that walks the visitor through the basics and "advanced readings" that offer more detailed study.
http://www.chabad.org/kosher
