Not sure where to post this, or if it will be of interest but here goes. I've been developing a digital signage application over the past year that has replaced the powerpoint slideshows we used to show on our College plasma screens.
MooTube is basic HTML code which embeds a personalised YouTube playlist with RSS feeds from your Moodle site.
It's simple and free to set up, just create a playlist in YouTube, add your playlist ID and RSS Feed URLs to the plasma.htm code (instructions provided) and you're away!
We use our YouTube playlist to hide educational programming in with music videos and student created content. The RSS feeds come from our main news forum and Woot is our 'public' message forums, but you can modify literally everything easily with just a little photoshop and notepad.
And please let me know any comments, suggestions, etc