New to the Search Marketing Standard Blog? Subscribe to our blog via our RSS feed and receive updates and tips. Here are five of the most interesting and important news items and updates from the current week: 1.  Foursquare Rolls Out First Ads — Mashable has details on Foursquare’s recent announcement that they will be entering the paid ad space. There’s also a video tour of Foursquare’s new office that is worth a look if you’re like me, and like to see what other people’s workspace’s look like (just don’t ask me to post a video of mine!). 2.  With Three Key Exits, Facebook’s Top Talent Departures Continue — AllThingsD identifies and discusses all the recent executive talent…