An op-ed in the Guardian discusses how content curation can help improve a brand's trust and authority, but is often viewed with mistrust:
Content curation is sometimes viewed with suspicion by prudent brand managers — and with good reason; any piece of content authored by a third-party that is republished by a brand has the potential to start all matter of headaches for the legal team.
The article also covers a few case studies such as Intel's IQ site.