There's a pretty decent ebook called "Social Media For Small Business." It's sponsored by Microsoft (it says on the front page) and I found it during a regular search, so I don't think it's a paid product:
http://www.ducttapemarketing.com/soc...orbusiness.pdf.
Social media (and social media marketing) is too large a topic, with too many applications to be able to say it's not relevant for small businesses. Having said that, small business in SA is not the same as small business in, say, the US, in terms of potential clients who hang around social media sites.
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