title: what html5 features are already safe to use in a cross browser way?
body: <p>I'm already using the HTML5 Doctype in all my pages. Are there any other html5 specifications/features I can start using right now?</p>
  
  <p>The conditions are:</p>
  
  <ol>
  <li>Cross browser - support for IE6 is optional but please specify</li>
  <li>No hacks please [javascript or otherwise]</li>
  <li>its completely acceptable if the feature degrades gracefully in older browsers</li>
  </ol>