The Writer's Symposium is a group of 20 science fiction/fantasy-type writers who hold seminars and such at Gen Con designed to help writers write. I attended one of these... and, to be honest, I wasn't terribly impressed. It quickly devolved into "why I like to write sex scenes." On the other hand, these are writers - not professional public speakers - and even if I didn't get a lot out of their seminar, I might get something out of things they write that are designed to help other writers (with an acknowledgment that some of their tips and such are also useful to GMs... since they are somewhat rpg-focused, they seem to keep this in mind).
Enter their blog. It started off last week, and it only has a single entry with actual content so far. I hope that they will keep it up and that it will be useful.