New to the Search Marketing Standard Blog? Subscribe to our blog via our RSS feed and receive updates and tips. On this day that the London Olympics begin, here are five of the most interesting and important announcements and posts of the week: 1.  Facebook Revenue Growth Skids, Shares Plunge — Reuters reports on the news of Facebook’s stock plunge following their announcement of declining revenues and no outlook being offered for the current period. 2. Facebook Launches New Pamela Vaughn at HubSpot has a great explanation of how the newly announced recommendations plugin’s bar differs from the previous recommendation box and why you may want to look into it further. 3.  10…