title: What are the differences between display:box and display:flexbox
body: <p>It's my understanding that the CSS Flexible Box Layout module is being rewritten and that <code>display:box</code> is being deprecated in favor of <code>display:flexbox</code>.</p>
  
  <p>Is <code>display:flexbox</code> currently supported in any browser (release, beta, or nightly)? Does anyone know where I can find some information as to what's new in flexbox, what the differences are between it and the old module, and/or why the old module was rewritten?</p>