I love these kinds of analytical graphs.
Infographic about the current state of investment in internet companies: http://gigaom.com/2011/07/17/is-it-really-a-tech-boom-or-a-bubble-infographic/
Infographic about the current state of investment in internet companies: http://gigaom.com/2011/07/17/is-it-really-a-tech-boom-or-a-bubble-infographic/