impressive series of posts by Christopher Higgs on "experimental literature" on my current favorite litblog, HTMLGiant. I especially like the last one, on the notion of blankness--something I've been obsessed with myself from time to time.
This is the kind of thing I think a blog is good for, but it's also the kind of topic I tend to run like hell from, as I do not have the kind of brain made for defining and categorizing. (Case in point, the bit where Higgs makes a distinction between conceptual and experimental literature.) In general I am too aware of, perhaps too fond of, the tendency of distinctions to blur and categories to bleed; I admit the usefulness of holding them in mind, but never seem to be able to do so myself.
Anyway, these are rigorous and interesting posts, well-illustrated and interestingly commented upon. Give them a look.