Chemical and Physical Structure of Fatty Acids - a good site showing the structure of fatty acids, saturated vs. unsaturated fats, trans fats, and omega fats.
Cholesterol Numbers - Understand blood test results for cholesterol. This site also has nice slide show links too - at the top where it says 'tools and resources'.
Wikipedia Cholesterol - the Wikipedia entry about cholesterol.
Cholesterol Quiz - take this quick 5 question quiz to check your understanding of cholesterol.