http://username.github.com/archive
http://username.github.com/atom.xml
http://username.github.com/categories
http://username.github.com/
http://username.github.com/pages
http://username.github.com/sitemap.txt
http://username.github.com/tags
http://username.github.com/assets/css/style.css

http://username.github.com/lessons/2011/12/29/jekyll-introduction