Apple seems to be *so* happy to finally fess up that this MacBook RSS (RandomShutdown Syndrome) isn't just all in our heads. xlr8yourmac tracked down a new Apple Knowledgebase article that is another amusing one-liner from Apple's support crew: "If your MacBook is shutting down intermittently, please contact AppleCare for service." A little bird told us they finally know what's going on and have a fix for the issue, but don't quote us on that.
If you are an unfortunate MacBook RSS victim and you do give AppleCare a call, feel free to comment here with your experience and how Apple is treating this issue. We honestly don't know much more about it aside from this theory, so we're in the dark as much as you are.