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Thanks!

The model that I had in mind was to simply have Group A link to Group B, Group B link to Group C & Group C link to Group A.  I divided the groups evenly by PR so that everyone should get roughly the same amount of juice.

I have been doing some research on where some competing links are getting their links from and I see that a decent number seem to be getting some juice from local.com.

My question is- have the panda & penguin updates rendered these useless- or even worse can links from directories like this now harm my SEO?