Environmental Graffiti posted a bar chart suitable for entry into the Bar Chart Hall of Shame.* I made a list of at least ten ways to improve the chart, but it's more fun to read your comments below. Questions for you: (1) How many ways could you improve this chart? And (2) how many ways can you misinterpret the chart's meaning at first glance? Please share your comments about the quality of the chart in terms of signal vs. noise, contrast/affinity, color, area distortion, labeling, etc. (Although, since the comparison is just on price, perhaps a simple table would lead to more clarity (and less snickering).
And speaking of chart junk, Seth Godin had some interesting things to say about charts here and here. And the very cool blog Junk Charts had a response to some of Seth's ideas.
*I'm assuming this was intentional; EG is an interesting site.