Remember when I threw-down some ghetto graphs with anonymous?
It’s a little rough, but I’ve released the tool that lets you create these charts for your tumblr blog.  Additionally, this tool analyzes the type of posts you make to tell you your “Blogging Style.”  (For example, I’m a Visual-Creator because I mostly post original photos).
Enjoy: The Simple Tumblr Stats Tool
Edit: I’ve updated the tool slightly to include details on who leaves you notes. Read about it here.