I wrote a simple little add-on that others may find useful. It allows administrators to manage announcements in an Announcements folder in the Data Dictionary. Then it displays those announcements on the Alfresco Share login page and in a dashlet.
I wrote a short blog post about it, but if you just want to grab the code and try it out, please do.
Even if you don't need to leverage this kind of functionality, it may be useful as an example of how to leverage some very basic Alfresco Share extension points.
