Yes, the claim is that you can become a better blogger in just 31 days! However, you will need to participate in a practical blogging project for 31 week days. You will get a break over weekends. I am seriously thinking about doing it myself. As you can see here at my blog, there is ample room for improvement!
So, if you are interested in being part of this "better blogger" project, join Paul Steinbrueck at Christian Web Trends as he guides you to becoming a better blogger! BTW, this project starts on 3 May 2010.