Rotary Car Club is a new and upcoming national forum.

UMS Tuning is the best place in AZ when you need some dyno time.

Yawpower has some great articles from the mind of Paul Yaw.

MazdaMotorsports has some great tech info including clearances, clearancing procedures, and engine break in details.

RCCAZ is the local Phoenix area rotary car club.

sevenstock.org for details on the #1 rotary event in the world

How Stuff Works.com has a great description of how a rotary engine works.