This week's Friday Squid Blogging post from Bruce Schneier is, as the title suggests, a short essay about squid egg sacs. It does not itself contain security or privacy analysis, despite appearing in a feed that often includes such commentary.
Instead, the post serves as an open thread. Schneier notes that readers can use the squid post to talk about security stories in the news that he hasn't covered. This makes the post a community forum rather than a standalone security briefing.
The only source supplied is Schneier's post, so there are no differing sources to compare. The significance lies in the format: even a nature-themed post can become a placeholder for security discussions that might otherwise go unnoticed.