We posted this little video (see end) last year, but it's still a great, and fun, example of how social media is, and can be, used.
Whist the video doesn't reference the cloud, it does demonstrate how the cloud, the web and social media are completely changing the way we can communicate with each other. Its fun, refreshing and engaging and I'd use it to show anyone not familiar with social media how it can all work together.
Personally I'd have thought that Joseph and Mary would probably have used the phone at some point to find out about donkey-hire and an inn for the night and of course our technology would have been ideally suited to help those companies deal with their calls during a very busy census season!
I hope you all have a great Christmas and all the best for 2011.