Google allows you to search up to a certain date. The results up to April 30th remove much of this latest "resurgence" of the quote, but it's still pretty much saturated with quotes about Bin Laden, a lot of the dates are just wrong and confusing Google.

I still don't see anything definitive attributing the quote to MLK

http://bit.ly/kC6VIR <- Google Search to April 30th.