SEO Analysis Using Data Visualization

Nice little case study:

SEO Keyword Analysis: How to Use Data Visualization to Make it Quick and Easy by Niels Hoven
Do-it-yourself keyword strategy for under $10.
The foundation of a good search engine optimization (SEO) strategy is a well thought-out keyword strategy. Unlike the instant gratification of pay-per-click advertising, organic search efforts often take six months or more to show results. During those six months, your business will be creating mountains of content and building targeted links, all focused on 5-10 specific keyword phrases. If you've targeted the wrong phrase – perhaps it was too competitive, or there wasn't enough traffic, or the traffic didn't convert – the wrong keyword strategy will have cost your business thousands of hours in wasted effort ... "