I think the author has an interesting proposal in his idea of "Letters to the Author"; however, one thing lacking in such a scheme is that the "Letters to the E

I think the author has an interesting proposal in his idea of "Letters to the Author"; however, one thing lacking in such a scheme is that the "Letters to the Editor" tend to come at the start of a publication, which itself can be thought of as a fairly linear medium. Blogs (and websites in general) tend to be non-linear in use, as hyper-linking disrupts any flow intended by authors. So while the idea is sound the implementation isn't there yet for the web based medium. Perhaps starting off each post with a small "Letters to the Author" subsection might satisfy the goal.