There's a short article in today's (UK) Observer - an interview with Honeyboy Edwards about Johnson.

I tend to approach these articles with some weariness these days - the same stories, and refutations of stories, and refutations of the refutations - plus the one and only picture of RJ with guitar.

(Thinks: I wonder if the reputed RJ guitar's been sold for $2,000,000 yet...)