online communication

On mobile, messaging platforms have taken over from voice and are still outstripping the various social media vehicles, but these are skewed towards consumers talking to each other. B2B marketing is still evolving on these channels, while the one-to-one of email is still comfortable for users.
While you probably have a good idea about the meaning of the basic happy and sad emoticons, :) and :(, what do people mean when they use others such as :/, <3 or ^_^? It's likely you have a vague idea of what feeling they represent, but can you really be sure?
Mention "YouTube" and "British government" and "failure" to most people interested in online politics or comms and the chances are they will think of Gordon Brown and that YouTube film with the unusual smiles.