I chose facebook as my cool website. It uses HTML 5 and I saw a lot of akamaihd.net in the code early on. Although facebook is not literally the coolest website that I could find, it is hands down the most complex form of site that I know of. Facebook is the most popular social “utility” that the internet has to offer. Thousands or millions of people are members whom each own and personalize their page. I don’t understand how it works!
Facebook is always changing its layout and slowly becoming more and more aesthetically pleasing. For example, we recently were given the option of having a cover photo over your profile picture and then again two or so days ago, everyone’s profile layout changed: the pictures and friends are on the left and your name is in bold, white font with a black outline. Personally, I find some of the only difficulties of facebook to be when the layout changes so much that you have to relearn how to navigate around your page.