Anyone interested in understanding social media, its value and its relationship to business should check out the 15 very short clips by Euan Semple.
http://www.guruonline.tv/business-social-media
From the website:
In this exclusive interview, social media expert Euan Semple breaks social media down into easy to understand terms and explains not only why every business should at least have a look at social media but also how they can make a start without the need of employing expensive agencies and IT professionals.