Have you heard of BlogBooker?
Haven't you? Well, BlogBooker is one of the greatest online tools in my opinion. It converts your blog into PDF in just a few seconds. So, if for some reason you're afraid you can lose all your content, be sure to keep your blog as a PDF archive. I do! I have two blogs, this one and one in my own language, where i mostly blog about my kid and family life. From time to time I use this tool, and I just did it, for both my blogs.