Dion Hinchcliffe recently wrote about the need for new business models for Web 2.0, presenting us with this great diagram of the current solutions:
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Personally, I think the same business models hold true whether it's Web 1.0, 2.0 or anything else. I certainly don't buy into the idea of "micropayments" - the TechDirt guys have it right when they say "locking it all up behind pay walls just means no one will pay attention to it." We could do with new ways to monetize mashups, but that's a slightly different issue.