I've been looking for a utility to painlessly backup my Blogger blogs for a goodly while. All of the previous backup methods I've found to do it have worked - but not in a completely hassle free, so easy even an untrained monkey could do it, way. BloggerBackup takes away the pain - ah, bliss.
When you first run the program you need to tell it about your blog(s). From the 'Available Blogs' drop-down select 'Add/Update/Remove Blogs'. This opens the blog selector screen. Now this gives you two ways to select your blog. The easiest - and the method I chose - is to simply type in you Blogger username and password and it goes away and gets a list of your blogs. The alternative - didn't try this because I didn't need to - is to manually enter the details of your blog. I guess you might use this if don't want to give over your user/password combo. Either way, once that's done you can return to the main screen.
Now for the actual backup. You need to select how and what you would like backed up. Select the Blog. Select a directory to save to. Select single file or one file per post - I chose one per post. Decide if you want comments backed up as well - didn't expect that - but I'll take it. Finally decide how much to backup. Click 'Backup Posts' and you're done. You'll see a list of the entries on the right and end up with one big file or many small ones depending your selections. I had over 300 posts and selected to get all posts. It backed them up in next to no time - brilliant.
Then next time I ran it I selected the 'Only new posts since' option. What a star. When you select the check box it automatically pulls in the time and date of your last backed up post. Start the backup and it adds only newer posts - simplicity on a plate.
I need never look else where to backup my Blogger Blogs - nice.
I guess the only downside is that it only works with Blogger - but heck, I don't care - I only use Blogger so I'm sorted. If you use Blogger and want to safeguard your blog I highly recommend this one. You can get a copy from http://www.codeplex.com/bloggerbackup
I give this one the Mad Tech Report thumbs up approval rating.