Although this article is focused on curation as a marketing tool, I think it's equally applicable to internal comms.
The premise is that content curation can be useful for enhancing a brand's reputation. "A study of 400 professional marketers conducted in March 2012 by Curata, an online content curation provider, shows 85 percent of marketers believe effective content curation establishes thought leadership and elevates brand visibility and buzz."
Why shouldn't this also be true of the internal audience? I think curation can be one way to establish the company as a source of reliable, useful information that helps people to understand the strategy, the market context for the business, and other interesting things going on in the field.
One issue I've seen in internal comms is a reluctance to acknowledge external sources, as though employees don't have access, or don't care about what the world is saying about their profession or their company. I believe providing good quality, reliable content - even if ( especially if?) it comes from the outside is actually a way to promote employee loyalty and trust in the company.
As Curata put it: "Just as readers want the news and audiences at comedy clubs want jokes, consumers want — and often need — reliable sources of information. Delivering reliable information can enhance a brand and increase brand loyalty."
Substitute "employees" for "consumers" and I think the argument holds up.