The Digital Medievalist Project has an RSS News Server http://www.digitalmedievalist.org/news/. You are welcome to post news about your projects, conference sessions, or software to this server. A web-based form allows you to submit items. You can also send your news items to the editors for publication.
We also have a page of Conferences listing conferences of interest to digital medievalists. If you know of one that is not included, add it!