I've been looking through the Pluto site and forums for the last week or so and am keen to set something up, especially since it uses Asterisk and Myth - two projects that I've been using for a while now.
One thing I haven't really seen any mention of though is support for digital photos. I wonder if Gallery2 (gallery.menalto.com) would be helpful here? This would allow Pluto users to easily share their pictures with relatives through the internet, and an app for the Media Directors could be created (or modification to the existing MythGallery module) that interfaces to Gallery using the Gallery Remote protocol, allowing users to browse albums on their TVs, etc.
Some sort of digital photo frame could also be added to the range - something similar to http://www.ceiva.com/home/hp/index.jsp
, but instead gets images from the gallery.
Anyways, just some thoughts.