You'll notice that many many of these are missing one or two (at least!) key features e.g. shareability buttons or embeddable videos that can be shared. But worth a look ;)

General newsrooms

• Iowa Gov (natural resources) http://www.iowadnr.gov/InsideDNR/SocialMediaPressR...
• Deloittes social media press room http://www2.deloitte.com/global/en/get-connected/n...

Curate social media presences into a hub

• Akamai hosts Facebook https://www.akamai.com/us/en/about/news/social-med...
• Movenpick http://www.moevenpick-hotels.com/en/press/social-m...

• Doctors without Borders http://www.doctorswithoutborders.org/news-stories/...