Aeroworks (World Class Aircraft -- QB™ --Quick Build Series)
Bob Godfrey
Composite ARF
Fliton
FLY-FAN
Krill
Multiplex
Proctor Enterprises (Vintage Model Aircraft Kits and Accessories)

Engines:

Aircraft International (3W)
BME Engines
Byron Originals Fuel
Cactus Aviation
Desert Aircraft
EVO Engines
Jersey Modeler
YS Engines  

Radio:

Futaba
JR
Hitec

Miscellaneous:

Aero Flight PRO Deluxe Simulator
DUBRO Products
Emcotec Power Distribution Units
Fromeco Batteries
Kirbys Kustom Vinyl Graphics
Micro Fasteners
Plane Wrappers (protect your plane from the sun!)
Smart-Fly Products
Tru-turn Spinners
Velcro Cinch Straps from EZWRAP
ZAP Glues
The Outdoor Channel

Websites:

NorcalRC
TeamFlyingCirkus
Kevin Langley Hobby Links
Molalla Radio Control Association (Grant Sharp's great flying field!)
Rcuniverse