Painfully Obvious: An Irreverent and Unauthorized Manual for Leather/SM Book

I read this after it came up at a Wiscon panel this year. Interesting, although perhaps it's a bit dated at this point, and I definitely noticed some things that I thought should be discussed based on what the panelists were interested in talking about (for instance, there's some discussion of setting limits, but not much talk about what happens when limits are reached, though this would seem appropriate given all the discussion of Goffman and framing of situations, and breaking the frame is discussed in other contexts. Also, I'm not sure the word "safeword" was ever mentioned-- this would seem to be important?). I'd also like to see some of this material explored by folks less attached to fairly rigid notions of gender roles-- with the exception of Pat Califa's piece, the work was fairly conventional in this respect. I might see what these other people have written lately.