I know there's lots of talk around here about 'noise' levels in photographs, but what about the actual sound that the shutter makes on an SLR? Is there anyway to silence it a bit, or is it just a reality that we have to deal with?
I currently have a Nikon D90 and find that in quieter settings (like a church) the noise from the shutter can be a bit distracting to people around me (i haven't had anyone mention it, but I'm guessing it's apparent). Do higher-end models have quieter functioning modes, perhaps?