The document discusses different types of blog hosting sites and their key features. It includes a table comparing Blogger.com, Tumblr.com, Wordpress.org, Boingboing.net, and Thoughts.com. Some of the metrics compared are number of users, type of blog supported, and tools offered. Blogger.com is noted as one of the first major blogging sites, while Tumblr emphasizes ease of use through short-form posting. Wordpress allows customization through themes and plugins. Boingboing is a collaborative filter blog and Thoughts.com aims to connect users from the first post.