Commerce 2.0?
avc.com
avc.com
I've done some e-commerce consulting projects and in the end it always turns to a discussion about "best practices". There's always the meeting with a client about something where the bottom line ends up being "Well... how does Amazon do it? They've invested a lot so they're probably doing it the right way".
Then they get their SEO people involved, and they put in their "best practices" 2 cents. And then it's the expert on conversion rates, and on and on until the site is just like everything else. But it's following best practices!
There has to be a better way, but with money at stake I think people are less likely to try something radically different than what's already working.
It might be facebook. fbConnect + fbCredits = social buying. Both of these exist but have yet to be combined.