Backing up your blog
There's no such ability. I can't find an easy way to export your blog, it could make things harder as saving images/text/videos/etc. manually would take time, esp. for blogs with a lot of content. A zip archive should be a good option with a size limit where it could be split into pieces for easier storage.
seeing the panic in the last days of soup when people tried to backup their blogs - indeed, this should be a feature here