just to help clarify:
to read the blog, go to http://blog.lib.umn.edu/desai003/myblog/
1) once there, you can comment to an entry, by clicking on the comment button. it will ask you to sign in and then you can write your statement.
2) or go to http://blog.lib.umn.edu/
and click on start blogging. you will be offered the opportunity to create an entry (look on the top toolbar). remember to save and preview. it will post when you reload the blog.
also you may choose to change your profile (on the right side of the page). please make sure it says your name.