Through Randomculture I've found this interesting article on Business 2.0. It's a month old, but it's still worth reading since it lists nine fads marketers/business people should ignore.
One of the overestimated buzz at the moment is about podcasting. According to Business 2.0 there are no revenues and therefore there is no business future for it.
To tell the truth I regard the article more as a provocation than as a serious analysis. For example, it says China will not rule (economically) the world...