GoDiscussions At The Internet Archive
The URLs apparently lead to forum threads.
The links have no title slugs, so it's unclear what content can be found at which one. As such this resource is (at least for now) a do-it-yourself tool for the reader who has a particular interest in GoDiscussions, which was active from 2006 to 2010.
GoDiscussions used the same diagram format as Sensei's, but the images haven't been preserved in the archive: so if you want to view a diagram, throw it into an SL sandbox. SGFs haven't been preserved either, except as text.