I'm going to hit the general smart things here and use that to segue into fanfic because the current internet writing kerfuffle is all about people saying things smart and not so smart about fanfic.
Kristin Nelson is making the best argument I've ever seen for not self-publishing if you want to make a career of selling novels via the large or medium presses, or at least for not doing it under your own name. Basically, if you self-pub in any way that generates an ISBN, the sales of that book are going to be tracked by bookscan and forever tied to your name. And every time an editor looks at your stuff they're going to be able to check bookscan and find out that your first book sold 75 copies and they'll know that that number is going to come up when they try to sell you to the bookstores and that's a very bad thing.
Jim Van Pelt with some interesting thoughts on fiction and essay and tools of writing.
Patrick Nielsen Hayden saying official things about Tor.com's submission policies for short fiction.
Finally, Charlie Stross to provide that segue into fanficton. First, saying more smart things about writing in the 8th part of his publishing misconceptions series, this one on the life and income of a writer. Hint, it's a rough job in a lot of ways.
Next, Charlie talks about his own personal position and feelings about people fanficing in his worlds and says pretty much what I would have said in terms of substance. I also like Jim Butcher's statement on fanfic in terms of outlining some practicalities and politesse. Likewise John Scalzi's take. And as a reference publishing/entertainment lawyer C.E.Petit talking about the legal landscape of fanfic in great depth.
Going back to Charlie, let me quote the part of his fanfic FAQ* that I am especially taken with: "In summary: I am not a precious sparkly unicorn who is obsessed with the purity of his characters — rather, I am a glittery and avaricious dragon who is jealous of his steaming pile of gold. If you do not steal the dragon's gold, the dragon will leave you alone. Offer to bring the dragon more gold and the dragon will be your friend."
Now, since I know everyone wants to know about the kerfuffle and is wondering about the dragon and the unicorn, here is a link to Scalzi's post summarizing the mess, and another to the blog of the unicorn.
*Which, btw, is terribly fun to say.