The Wall Street Journal has finally been excited enough by the effect of the iPod and its variations on Apple's share price to create this chart showing when each model was launched and the relevant share price. After a slow start as the first iPod and then the iTunes store was launched and then grew in popularity, you can see the upward trend occur after each subsequent innovation until the current stock price is almost 7 times what it was 6 years ago. The clarity of their cohesive design language and its evolution over time is also instantly appreciated at a glance. If ever business needed confirmation that design can have a significant effect on your ROI, then this piece of infoporn is it. Imagine if the iPod had been killed in the first quarter or two for not showing results!