Adding blog entries to your digital signage if relatively straight forward. Once you log in to your digital signage profile follow these steps:
1. Click Write a blog entry
2. Enter your entry title and blog entry
3. Click on save blog entry
You blog entry will now be listed on your digital signage profile.
Here's a quick video tutorial on how to do this:
http://www.youtube.com/watch?v=TmLdCGEI6_Q