Just an FYI for all Marketo friends out there that I discovered earlier today.
When creating the Facebook specific meta tags on landing pages keep the following in mind:
Edit the landing page, click the Landing Page Actions button at the top left, and click Edit Page Meta Tags.
In the Facebook OG tags section you must enter the full HTML meta tags as follows.
OG tags are usually in the format:
<meta property="og:title" content="My Post Title"/>
<meta property="og:caption" content="My Post Caption"/>
<meta property="og:description" content="This text appears in the post description"/>
I hope this helps someone in the future!
-Geoff