It seems that the symposium at Unmercenary Readers has ended. There were more reviews (four) than comments on reviews (three), which is not a good sign. Participation was very low. Some blame may be put on the book being an odd combination of unsuited for its role, level-headed and somewhat bland. It was not bad, nor was it particularly good. I think this also is an artifact of its (likely) construction and condensing from previously written material. I suppose I will never get confirmation on that suspicion; though, reading the full book, if I could ever get my hands on it, would go a long way towards that goal.
Much of the blame may come from it being on a totally separate blog, with no particular "big names" (in the small world we are talking about, here) participating. Maybe some blame lies on the too-cute "rules" for the site putting off some readers and writers. (I for one am thankful they were not followed to the letter.) Some blame also may be laid on the fact that none of the reviews–and I include my own–had anything terribly interesting to say about the book, perhaps because there was little to say. A selection of the dozen or so great lines in the book would probably have been the most lively offering possible, but that is not so much a review as a substitute for the work entire.
My guess is that future symposia would be better organized by one blogger or another, inviting other bloggers to take part in a discussion to take place on a particular day or week in the future. Posts would go up naturally, later posts could take into account prior ones, and there could be some more of the "organic" development that our medium is suited for. Just a thought. I certainly welcome discussion on this point, because I do think that such gatherings on topics or books are fruitful uses of the internet.