I am the webmaster for a school that uses Google Apps for Your Domain, so every family has an account at our domain.  We would like to create a blog that can only be read by school families.  Blogger appears not to support this feature.  (We would have to add everyone in the domain individually.)  Is there another free (or cheap) blog service that offers this functionality, including using Google authentication (i.e., not requiring people to create another password)?  
Blog readable only by people signed into a certain Google domain?
google apps;account management;blog;google account;authentication