Make post HTML more semantic

[Sequoia]

<article class="post">
    <header>
      <h1>Title</h1>
      <p class="posted-on">Posted on <time datetime="2012-07-28T13:00:24+01:00">July 28th 2012</time>.</p>
    </header>
    <p>Lorem ipsum dolor sit amet...</p>
    <p>Lorem ipsum dolor sit amet...</p>

    <section>
      <h1>Comments</h1>

      <article><!-- comment 1--></article>
      <article><!-- comment 2--></article>
      <article><!-- comment 3--></article>

    <section>

  </article>