To be informed on what happen on Dolibarr project, you can subscribe to social networks groups or Dolibarr mailing-lists.

Social Networks:

If you subscribe to Dolibarr social networks, you will receive news directly onto your personal network feed (facebook private wall, twitt list, google+ feed, linkedin news ...)

Links/list of Social Networks are available onto the Dolibarr wiki documentation.

Mailing-lists:

To exchange by emails with all the Dolibarr community (developers or users), you can use some of the mailing-lists dedicated to each kind of people.

You don't necessarly needs to be a member of the Dolibarr foundation to subscribe. Subscription is opened to everybody with a valid email. 

Links/list of mailing-lists are available onto the Dolibarr wiki documentation.