Let’s start off the week with some recent social media developments you might have missed:

– Since we often hear from people questioning social media’s value, we should mention five “surprise success stories” using Facebook and Twitter for business detailed by Rick Burnes of HubSpot His list includes an equine dentist, a manufacturer of prefabricated steel buildings, makers of specialized paint and paper and an aircraft maintenance and support company. And there are plenty more to come.

– It’s now possible to “follow” companies on LinkedIn. This new feature, quietly introduced in late April, enables users to keep up with companies, whether one is looking for a job, looking for b-to-b-opportunities or just wanting to follow business developments. It’s a primitive, one-way system compared to Twitter and Facebook, in which you can interact directly with a company. Nor can companies offer timely status updates. However, you can see the status updates of key employees as well as promotions and other company news, assuming employees and the company are updating their accounts..While LinkedIn has a lot of work ahead to keep pace with the major social networks, this is still significant step in the right direction.

–Are you a job seeker? Since we regularly work with a local jobs networking group to assist the unemployed, we thought we’d share 13 “essential tips” for finding a job using LinkedIn from author and former pro athlete Lewis Howes. Howes offers solid advice, particularly for those who are new to the business networking site. One follow-up comment: If you add your blog or Twitter feed to your LinkedIn profile — as Howes correctly suggests you should do — make darn sure what you write on those places is professional. Otherwise, you’re asking for trouble.

– We know a lot of folks — of all ages— who don’t “get” Foursquare. Many of these same people also still remain openly skeptical of Twitter (We’re trying!) While the business potential of Foursquare has barely scratched the surface, consider this: Foursquare founder Dennis Crowley told Business Insider’s Henry Blodget last week that the service is adding 15,000 users a day. Not exactly Facebook numbers, but numbers that can’t be ignored.