The Blogging Church is a new book by Brian Bailey. I think it is one of the most readable, and practical guides to blogging I have come across, and is something I wish was around when I started out.
The book whilst using US examples still translates well in the internet global village. This is not a tech oriented book, or a high level philosophy of blogging, rather it is a fantastic overview of how blogging started, what it's about, how to think through starting a blog, how to integrate it into church and community life, what makes a good blog etc.
If you want to understand blogs, want to get into blogging, want to improve your blog, I'm sure this book will be a superb investment. It's one I'm going to recommend regularly.