Restarts 99% of the time get announced in Announcements here on the forums, or General. They also get mentioned on Twitter.
Competitions and Winners are mentioned in Competitions and Giveaways as well as on the website and on Facebook and Twitter.
Developer Diaries / Updates are mentioned on Twitter and Facebook, the full post is made on the forums under announcements but also on the website under News.
Important Update information and Events information is always posted on the forums and website, and then on Twitter and Facebook as necessary.
To answer you regarding the new update in December, 4 admins (or more) were on the forums answering pm's and responding to posts on the forums for example, see
http://celtic-heroes.com/forum/viewtopi ... =4&t=66657.
Twitter was updated in the same way but the posts in this regard are easier to track and available to the wider audience much easier.
Please pm me if you'd like to submit ideas for future news and announcement positions.