Web 2.o – what do it are?

I keep reading articles that attempt to sum the entirety of the whole 2.0 thing. I have a tendency to discount, if not disregard the seven-word summation… web 2.0, long tail, experience… you get the drift. Half of those I hear talk of 2.0 as the point at which the web delivered real interactive applications as opposed to corporate brochures and catalogs. Yet others see it more from an economics and commerce perspective. That being the second wave of added value and monetization of the internet. I think both are right, and both are wrong. It will likely prove to be the second of a series of overvalued and optimistic eras regarding the future worth of companies promising to deliver via the web.