Random Thought: danah boyd

While the technological features are consistent, cultures that emerge around Social Networking sites (SNSs) are varied...

Nothing surprising there, right...?

This got me thinking...
What are the technological features that are consistent?
What is culture as opposed to a culture?
How does 'culture' manifest/ replicate on SNSs?
Is it significant for marketers, public relations practioners, journalists, organisations and individuals in general?