tedster - 4:41 am on Nov 23, 2011 (gmt 0)
I'm not sure the Google Alg is really qualified to tell which are useful and which are not, and thus should not penalize for authorized copy of fragments creating a useful whole.
It's been clear in the various leaked quality rater documents that Google does acknowledge the potential value-add that various kinds of mash-ups can offer. Whether this is accurately accomplished via algorithm in every case or even most cases, is of course up for dispute.
If I were offering that kind of website, I would take care to include a little something more than just the reprints of the excerpts - as a kind of insurance policy, yes, but also as a kind of contextual orientation for the visitor.