Tool Two was frustrating as well. It has been awhile since I had looked at the 11 Tools so it took longer to remember how to login and post.
I setup a Diigo account and also used Google Reader. I found several blogs that looked interesting in Diigo, but was not able to actually subscribe using the Google Reader. I got an error message that said that it needed to be set up by the Google Administrator.
I went into Google Reader and searched and found some interesting blogs. I searched using concert band and teaching and found a couple of blogs that I thought sounded interesting. Upon examination, though, many of them appeared to be more sales oriented.
I chose the option of signing up and following other bloggers, because I think that I will feel very strange about posting on other people's blogs.
I did find a couple of band composer's blogs that I plan on going back and looking at. There is also the Yellow Board which is more of a bulletin board where band directors can post questions and comments. I didn't initially see a way to subscribe to a blog or RSS feed, but I plan on going back and looking at it more in depth later.