Olympus FL-20 compact flash unit. Guide #20. Has TTL, auto, manual and flash brightness adjustment. Comes with case. Fits Olympus and Panasonic cameras including OMD. Uses 2 AA cells. Cost $150.
Kit also includes Wansen remote flash control, which works perfectly with the FL-20 (and other Olympus flashes). Mount the flash on the remote's shoe, which also has a tripod socket, and fire it remotely from anywhere in the room. Great for controlling the light direction and also for macro photography. Uses 2 AAA cells. Remote attaches to the camera's hot shoe.
Only $50 for the whole kit.
Located near Perth.