Every blog still follows the very same structure: they are sorted by date in descending order, they show up one at a time in a long stream. Only new posts (or those manually chosen) show up at the top. As soon as I post a new article, the previous one become less relevant. If the blog is paginated, last month's posts will be buried and hidden in previous pages. Most people don't navigate to previous pages nor go through tags (which only help so far).
Full article: http://www.akitaonrails.com/#.UYcw7TVO8SE.twitter