Chris Armstrong (he of the Long Tail idea and book) has somenew ideas about how the economy is going to develop, what with (as he calls it) all this "fremium" going on.
That is, with goods and services being provided free to hte consumer, the cost of production either being carried by advertising or by premium users subsidising the free ones. Of course, this isn't an entirely new idea, TV and radio have been free to consumers ever since they started. But it is moving out into other areas, changing more of the economy, as Google is proving.
There as excellent interview with him at the 123-reg blog which is well worth reading. I was extremely impressed with his last book (I reviewed it for one of the newspapers and said so) and I wonder if his next will be as good.