can anybody help me on this: How do I discern which social networks are best for my market?

[Elliott Saunders]

[Jake Birdem]

Some trial and error testing is usually involved, general advice in social network marketing tutorials is probably the best you will get for starters.

Interestingly Facebook paid advertising "Interests" demographic settings will show you the number of members with those interests, which may help you identify the number of target-able people for your biz.

[zealousmom917]

Well, I think.. To find your audience, start with a search on Google for keywords specific to your audience to cast a wide net. You can also drill deeper by performing the same searches on specific general networks, such as Facebook or Twitter.

[Frank Denver]

You can check out gatcentric's interest-based networks. Maybe one of them fits your needs!