Vores Oel, an Open Source Beer
Trendwatching has just published a customer-made update, exactly one year after their last coverage, with new insights and hands-on examples of firms already profiting from co-creating with their customers.

They define co-creation as “the phenomenon of corporations creating goods, services and experiences in close cooperation with experienced and creative consumers, tapping into their intellectual capital, and in exchange giving them a direct say in (and rewarding them for) what actually gets produced, manufactured, developed, designed, serviced, or processed.”

UPDATE:
A critical reflection by Chris Lawer on this report