There are a number of open source data visualization packages out there – R is one of them, and there are a LOT of very cool things that folks can do – take a look at this one:
Passed along from James Fee’s blog: Click here for the link
You may recall seeing this great visualization from Facebook last week on the links between friends. Well the creator of that graphic has blogged about how he did it using R and some amazingly simple processing. R is one of those tools that isn’t used in our space enough (really, you use Excel for analysis?) and if this doesn’t open your eyes to its great potential, your priorities are in the wrong place.