Social is easy

The social bandwagon (image from www.kyanmedia.net)
Social networking, social tagging, social newsgathering. The social concept, that is, where we share everything, is spreading like wildfire. Even the BBC has a social media editor now. These people seem to agree with me.
It’s similar to the way the pared-down easyJet approach to business spread into other verticals, such as hotels and cars. Actually it’s so sucessful it’s even threatening on making into the most wasteful place of all: government. The UK’s Conservative party have even called for easy-style local government.
What I’m wondering now is: how far will ‘social’ go? What other verticals can take advantage of it, and how? How can businesses harness the power of ‘social’?
(And what’s the next useful business/media/tech concept du jour?)