There was a time when bloggers/diarists/journalists believed (rightfully so) that their content would last forever. Here in 2013 that is no longer the case.
A Reuters blog article by Felix Salmon seems to suggest that Google has become a willing host for the pernicious parasite “link rot,” for which the sole cure may be backing up or downloading/re-posting collections of chronicles. If you want it, save it.
*Server space is the new magnetic tape[+]
You can also use the xml files to create a PDF of your blog using BlogBooker.com