Google will already penalize a site that has excessively identical content. If it gets really bad, they may try and implement something, but I think that would be some way off anyway. If a middle-man means that something is presented in a more easily understood and accesssible fashion, then I don't see it as a bad thing.
Also, as I said to Incka, you wont have any extra PR to throw around unless you source backlinks, just like any other site. Just because I site has loads of pages, doesn't mean it'll have loads of PR.
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