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Recently, there have been several folks coming out with infographics and timelines on Google's update history. They all have their advantages.
Most recently, SEO.com released their Google Wages War on Spam Infographic. It is really a fun one to look at. Here is the low resolution version, but grab the high one from SEO.com.
Forum discussion at Sphinn.
Comments:
arsenal blog
08/18/2011 02:34 pm
Wow, This is def one of the better SEO onfographics I have seen in a while
Rajesh Mergu
08/23/2011 11:58 am
image is not much clear... give a high resolution image pls