I've heard of it. It killed a friend of mine who had had surgery. Based on what I, in the general public, have heard; I'm under the impression that one of the biggest problems associated with the spread of MRSA is health-care workers who don't take enough precautions to prevent it.
I heard of one hospital (Johns Hopkins, maybe?) where a concerted effort (over, I believe, a period of about a year) to educate health-care workers on things like hand-washing and cross-contamination resulted in decreasing MRSA infections dramatically.
Personally, I've been pretty shocked to hear that so many doctors and nurses are apparently in need of being reminded to wash their hands more often, or to be more careful about some of the other things they do.
Maybe it's just the particular little group of "general public" I hang around with (generally, middle-class adults), but I'm under the impression people are quite well educated on the matter of MRSA.