I don't really have any examples for low light shots, but I just came back from a Vegas trip with family, and the settings I found to work with were, indoor low light was what I mentioned before:
White Balance: Flourescent
Saturation: -1 step
Exposure: +0.5 step
This will work well for most scenarios, giving you a more natural color reproduction, but one thing that killed a lot of my photos was I forgot to bump down the ISO to 100, so I had a ton of really noisy, but more accurate (not super accurate) color reproduction. In some cases however, I had to bump saturation back up to get really nice pop out of my pictures, this is especially for subjects with more contrasting colors like reds and such. I think if I had bumped down the ISO to 100, I would have had some really nice low light shots without flash.
One other tip I found is killing reflection by putting the contrast up and exposure down. In the Aria, they had these boxes with these manikins in them for some show, but a sheet of glass was in front. The boxes inside them were dark while the dummies were white. Taking it with a higher exposure lead to higher reflections, and using the settings I just mentioned minimized or sometimes removed the reflection. Thought I'd throw that out there.
One more tip, is if you are finding the photo coming out too dark (due to a bright light source behind your subject), use tap to shoot instead of press to focus (you can try messing around with the frame weight if you insist on press to focus). I find that this will pump up the exposure just enough in some cases to prevent silhouette type photos.
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