From the Announcement:

Click on the “Become a Fan” icon, at the top right of the screen. You’ll then be treated to updates in real time, as they’re issued.

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The new Facebook page will post information about all aspects of the Library. Fans will be among the first to know about the latest NLM developments, receive notifications on conferences, guest speakers and other events, and be guided to the vast and various research resources NLM has to offer. They can also read the latest issues of NLM’s popular consumer magazine, NIH MedlinePlus, and its Spanish/English language counterpart, NIH MedlinePlus Salud. Viewers can browse through historical images and contribute to discussions on future projects, all via their favorite social networking site. The page will also lead users to content from NLM’s growing roster of social media sites.

Source: NLM