Edit: ozarque's journal also came up in the discussion last night. Check it out in general (along with her books). One relevant entry: http://ozarque.livejournal.com/176349.html (the discussion far more than the original post).
And I had totally forgotten Jeff (the "Tact filter" author) was now on my f-list. *waves* Hi, Jeff! He points me to another discussion of the Tact filters essay: http://dawnd.livejournal.com/213255.html?thread=1482503