They Rule is an interesting demonstration of how to visualize the connections between powerful corporate officers. This is the kind of thing that Anacubis does really well with different database vendor sources.

They Rule allows you to create maps of the interlocking directories of the top companies in the US in 2004. The data was collected from their websites and SEC filings in early 2004, so it may not be completely accurate - companies merge and disappear and directors shift boards.