Social Marketing Funnel
The Social Marketing Funnel illustrates the life cycle of customer acquisition that occurs when brands add value by educating consumers, providing quality content, engaging in conversation, promoting content, people and other brands through social media and networks.
The benefits normally achieved through marketing are supported throughout the entire custom experience, industry interactions and the business community.
Social Marketing Funnel, originally uploaded by ggiagency.

I covered this topic in a piece "Social Media Conversion and the Social Media Marketing Funnel" at http://bit.ly/dsPrq … worth checking it out.
Best,
Social Steve