I like the following: http://visualwebsiteoptimizer.com/split-testing-blog/ http://visualwebsiteoptimizer.com/split-testing-blog/ http://marketingexperiments.

I like the following: http://visualwebsiteoptimizer.com/split-testing-blog/ http://visualwebsiteoptimizer.com/split-testing-blog/ http://marketingexperiments.com http://marketingexperiments.com http://whichtestwon.com/ http://whichtestwon.com/ http://kylerush.net/blog/optimization-at-the-obama-campaign-ab-testing/ http://kylerush.net/blog/optimization-at-the-obama-campaign-... (previously mentioned)