43 reasons why government should blog
In the US government gateway site there’s a page listing the active and past official Blogs from the U.S. Government.
Looking through the list of 43 blogs, there’s a wide range of topics on which this medium has been used – from AIDs education, through Art, Environmental issues and Foreign policy to Defense.
If your Department is considering whether a blog would be an appropriate tool to communicate your message and hold a broader conversation, this is a great starting reference.