I personally find vudlab's charts pretty cool. I first came across them in the Simpson's paradox article[1] and i really loved them because they let me EXPLORE the data. Yep, they're interactive! That gives a whole new prespective to the readers.
anytime someone looks at a chart, they should be able to ask "but what happen's when x, y and z change?" being able to manipulate the data without forcing the audience to run calculations themselves should be the norm. it takes work, but i hope we get there someday.