This camera is just a little bigger than a Canon G11 with the 20mm F1.7 pancake lens. It takes excellent low light pictures, has a built in flash, and shoots awesome 720p @ 30 FPS video. It uses interchangeable lenses and you can buy adapters for just about any brand of lens.
$900 with the 14-45mm Kit lens.
Here are the lenses I have currently
14-45mm F3.5-5.6 Zoom with IS $350 20mm F1.7 Pancake $400 30mm Sigma F1.4 $170 Used 50mm olympus F1.4 $85 Used 50mm Canon F1.4 $42 Used 85mm Nikon F1.8 $135 Used 135mm Canon F2.8 $8 Used 28-70mm F2.8-3.8 Zoom$13 Used
The camera isn't cheap but the used MF lenses are. They make this a really awesome compact camera.