Business Week magazine features an article by Maria Popova giving a brief overview and examples of some recent data visualisations.
The article tends to focus on the more aesthetically oriented pieces but is a good overview of attractive looking pieces and smaller set of useful visualisations such as crime spotting.
She ends the article with some brush stroke examples of where data visualisations could be used for within a business context. While by no means a full coverage it does spark some potential opportunities, especially taking large sets of data that are shown to consumers as tables and using a visual representation to improve that communication be it energy, telecom or banking.
At Flink Labs we're very bullish on using data visualisation to engage with and communicate with your customers and stakeholders. Aesthetically attractive pieces such as Melbourne Trains expose a complexity hidden from the average commuter while the H1N1 visualisation engages with the population to, hopefully, put the number of deaths from swine flu in context.