Mr. Duggan's reviews have been (and will continue to be) a "go-to" refference for me when exploring recordings of Mahler works. My collection of Mahler recordings (and my opinions on how things should be played, particularly the Ninth) was greatly influenced by Mr. Duggan. I learned a lot of what I know about the Fifth, Sixth, Seventh, and Ninth from reading his reviews, and I too was looking forward to a future update. I really hope Music Web keeps these reviews online, as there is a wealth of information there, not just about Mahler--but about how to critique music. I know I certainly borrowed some of Mr. Duggan's techniques in reviews I've written over the last three years.
By the way...did Duggan ever comment on the Saraste/Oslo Philharmonic Mahler 6? With his love for the Sanderling M6, I figured that would be a clear winner...but I never got around to emailing him and/or keeping up with the Mahler-List discussions to see if that recording was ever mentioned.