I know it's not usually cool to post your own articles and all, but I started to write a response to this discussion and it turned into its own article.
I've self posted a number of times and I've yet to see a post saying "hey, dont self post"; sometimes they flopped, sometimes they did really well. No one complained :)
Indeed the guidelines actually encourages some types of self posting: if you want to add initial commentary on the link, write a blog post about it and submit that instead.
(and indeed this very submission seems to meet those guidelines exactly :D)