After I had to miss the to me most relevant talk so far, Jochen Johannsen's talk on the economics of digital publising (see my talk on publishing, pretty good overlap in the content), Martin Warnke gave an excelet and very entertaining presentation on the ubiquitous exponential shape of information sources: top hits on the left and the long tail on the right.

He first showed many examples of prominent top hits only to then, at the end, emphasize that the relevant innovations happen in the long tail. For this argument, he used the example of word occurences where the most common words were also the least relevant. Relevance sits in the long tail.