I've been playing with Tableau's graphing program and it really takes data analysis + elegance to the next level. I'd love to use this with students and teachers, but need to do some more playing myself.
It seems incredibly powerful, and the colors/design, well, they're just plain fantastic. Microsoft will have to take heed, because what's coming out of smaller groups like Tableau will give Excel a run for it's money. That being said, if you're doing serious number crunching/financial analysis, this isn't the tool for you. But if you need to present data in a visually compelling way, this is a winner.