I was made aware of the blog called "Infoaesthetics". The page is devoted to information design. You can find a number of really interesting examples linked from there.
I think it is important for anyone working with information technology, and especially in HCI and interaction design, to have a good understanding of visualization. We are entering an age where we will more and more work with digital material, and that material can take any form and shape we want. It all becomes a question of design! We can interact with invisible aspects of reality as well as the physical reality. So, we will face questions on how we want to interact with that combined reality. Where and how do we want to interact? Do we want to fill it with visual representations of the invisible reality or do we want to keep the physical and digital apart? My guess is that we are being drawn and pushed into a situation where we will always interact with a combined reality. What humans have seen as invisible aspects of reality will become "real".
We will be more and more interested in, what my previous PhD student Andreas Lund labeled his thesis, "The Massification of the Intangible".