The Alliance for Education is starting their own blog for discussing school district issues. You can find it here: http://alliance4ed.blogspot.com/
I'm not sure why the Alliance felt they had to start their own blog. They are perfectly free to participate on any of the existing blogs that discuss Seattle Public Schools. Moreover, I'm pretty sure that if they wanted to become contributors to this blog, Beth would be only too happy to have them. I doubt they asked.
No, they found all of the other various blogs that discuss Seattle Public Schools lacking the one thing they really wanted in a blog - the one thing that their blog will have that none of the others will have: Alliance ownership and control.