I used to have a Micro 4/3 cam, but sold it due to the size and obtrusive shutter noise. Now that I have a Canon S90, I was able to use both extensively for low-light shooting. I had previously thought that a DSLR or a micro 4/3 camera would have a pretty big advantage in low light, but now that I think about it, I'm not so sure. Take the following situation for example: GF1 with 14 mm f/2.5 (28mm equiv) S90 @ 28mm f/2.0 The GF1 is about 1.5-2 stops better in high ISO performance, but the S90 would actually have an advantage for photos of non-moving things due to the 2/3 stop faster max aperture, greater DoF from the smaller sensor, and 4-stop IS (~3 stops in real-world use). So for an image that you would need ISO 1600 on the GF1 @ f/2.5, you could use about ISO 200 on the S90 and get similar results. This advantage would be limited to taking photos of non-moving or slowly-moving things in low light, but I think it's pretty impressive that a small compact can keep up with a large-sensor DSLR or M4/3 cam. What do you guys think?