Post specific meta tags

Hi,

I would like to add post specific meta tags. Specifically for FB open graph:

<meta property=”og:image” content=”http://davidwalsh.name/wp-content/themes/klass/img/facebooklogo.png”/&gt;
<meta property=”og:title” content=”Facebook Open Graph META Tags”/>
<meta property=”og:url” content=”http://davidwalsh.name/facebook-meta-tags”/&gt;
<meta property=”og:site_name” content=”David Walsh Blog”/>
<meta property=”og:type” content=”blog”/>

I’ve tried putting it in the HTML editor but it gets erased. I’ve also searched for several plugins but none are able to do it at the post level.

Any ideas?

Thanks!