athloi writes to tell us usability expert Jakob Nielsen is stressing the importance of well-thought-out articles as opposed to off-the-cuff blog postings. "Blog postings will always be commodity content: there's a limit to the value you can provide with a short comment on somebody else's comments. Such postings are good for generating controversy and short-term traffic, and they're definitely easy to write. But they don't build sustainable value. Think of how disappointing it feels when you're searching for something and get directed to short postings in the middle of a debate that occurred years before, and is thus irrelevant."