http://setiradio.blogspot.com/ - A companion blog for the Are We Alone radio show from SETI.
http://blog.professorastronomy.com/ - A blog of astronomy information written by Kurtis Williams from Texas. Parts of the blog are based on studies funded by the NSF.
http://bongo69.wordpress.com/ - This blog is named “Above The Clouds” and includes information for amateur astronomers.
When I enter “astronomy blog” into Google I get more than 13 million hits. So, of course, there must be a blog of astronomy blogs. Or at least a directory of blogs along with ratings. See http://www.blogged.com/directory/education/science/astronomy