Library related blogs

Ok, I am finding this rather difficult because I don't really understand it. I have had a look at topix.net syndic8.com and technorati and have noidea why they exist. They are places it seems to me that anyone goes to to make comments about what is happening in the world especially the USA. I have looked for Sentor John Mccain and read some comments about him that I found interesting. I have also looked at at bloggers writing about Joe the Plumber and had a look at the state and art of blogging. I am not really enlightened.