How can Blogs be Valuable Tool?

I can see blogs being a revolutionary tool for educators.  Blogs have already changed the nature of how people receive or attain the news of today.  I can foresee the same type of impact on education.  The same way we will utilize our blogs to communicate our ideas concerning our action research projects, a principal can blog about the changes on his campus.  He can discuss the STARR test and it's implications, and discuss issues such as dress code, tardy policies, and cell phone use.  It can also be tool for him to communicate to his staff concerning his own action research.  I see a scenario where parents log on to a Principal's blog to find out information about events at the school instead of making phone calls to the secretary for that information.  We should always strive for new ways to communicate.  Here is another tool.  We should seize the day and make the most of it.