Lauren Fisher, co-founder of Simply Zesty and has a great list of examples of small businesses using social media successfully.
She even highlights some key lessons (i’ll paraphrase but you should click here to read the full post
Lessons
#1: Social media is about taking the mundane and making it remarkable.
#2: Adopt new technologies or channels early
#3: Be committed to regularly engaging with their community and keeping the focus on their product.
#4: ultimately the people that are the face of the company online. So personality and access to real people at a company are key.