I've been looking for a while for a decent way to back up my blog, which is housed at Blogger. I've finally found two that I'm completely happy with. One of them backs up your blog online and the other creates a pdf of it.
BlogBackupr - An online service that grabs your feeds and pulls your blog data for you. Everything is handled online automatically and lets you restore it via RSS, Text or Html.
BlogBooker - I'm really impressed with this one. This one backs up your blog to a pdf for you. I tried several of these programs that supposedly do this, but they only backed up a few pages. I've got over four years worth to be backed up! I needed something that could really do the job and BlogBooker is it. I'd like to eventually print out my blog into a book form and this cool little service is just the ticket to being able to do that. It used my exported blog xml file from Blogger so it was able to grab all of my blog, not just the last few days.
Hopefully my research will help someone else looking to do the same thing. BTW, both of these services also support Wordpress blogs. Good Luck!