This was a pretty good segment on ABC news a little while ago (9/2009)
I sent the link to my family to either listen to or read the transcript of the interview. My dad, who hadn't really understood crps yet, said this helped him to "get" what I'm talking about. I sent the link to my family members to help them all understand. It's not too complicated in terminology.
http://www.abc.net.au/catalyst/stories/2621515.htm#