OK, when I heard about Swivel the other day I thought it was good, but Many Eyes from IBM's Alphaworks is even more impressive because of the charts available, including network maps and treemaps - something even Excel can't do (as far as I'm aware).
Both Many Eyes and Swivel also hint at the possibility of providing private access to graphs and data (Swivel talks about a fee-based "professional" version), but I can equally see potential for a "social data analysis" tool like this inside the firewall with options to restrict data to groups or specific users. Of course sharing the data as widely as possible is what's its all about.
Its also interesting to consider with these social data analysis tools that not only are they making data analysis "social", but I can also see tools like begin to challenge our concept of a basic information unit like a "document".
Think about this - typically to create an ad hoc graph you might paste the data into a spreadsheet and use the tools in the spreadsheet to create the graphic. This activity is something people must be doing everyday all around the world and the net output of course is a spreadsheet file containing the data and the graph that gets stored somewhere. But in a Web 2.0 mashed up world there is no concept of a document with social data analysis tools. In fact it would defeat the purpose.
Unfortunately for an enterprise thinking of using social data analysis tools I can see that this may create a compliance and records management problem, unless the current generation of electronic document and records management systems evolve to automatically capture both permanent structured data and transient unstructured in context together. Now, that's going to be interesting to watch.