“As long as I can make sure that my data migrates to long lasting media at some point, I can protect them and read them far into the future. However, when that migration happens, I may have all my data, but I’ll have no idea when I wrote it. You see, all those filebase time information will be blasted away when I move the data onto a new filesystem.”
I’m using Radio for this site, and it can automatically archive blog posts to XML files. That is definitely a step in the right direction, and more than most other products will do. It is particularly tricky to get data out of Blogger.
And I still have too much email stuck in old proprietary formats that I may never be able to retrieve completely. Sigh.