Panasonic G3 w/14-42mm Lens: $299
If you want to get into micro four thirds on the cheap and still have a reasonably current camera and sensor, and prefer a built-in viewfinder, here's your chance. B&H has the Panasonic G3 with 14-42mm kit zoom on sale for $299. They're calling it a Black Friday special but this deal is listed until December 31. Free shipping, too. It doesn't get any better than this.
Panasonic Lumix DMC-G3 Digital Camera Kit (Black) DMC-G3KK B&H
Panasonic G5 and GX1; Lumix 14-45mm f/3.5-5.6, Lumix 45-150mm f/4-5.6, Lumix 100-300mm f/4-5.6, Lumix 14mm f/2.5, Lumix 20mm f/1.7
Olympus E-PM2; Zuiko 9-18mm f/4.0-5.6, 14-42mm f/3.5-5.6 II R, Zuiko 14-150mm f/4.0-5.6, Zuiko 40-150 f/4.0-5.6 R, Zuiko 15mm body-cap lens, Zuiko 17mm f/1.8, Zuiko 45mm f/1.8
Pentax Q; 01 prime, 02 and 06 zooms