I do not think it is possible, BoneBroth. We do not have this feature that Wikipedia has.
About the site survival, we currently are 4 active admins, and that is what a team is for. If one admin decides not to continue, the rest of the team will. So, be sure that poiscenter will go on.
You can copy and paste the most interesting posts in a file, if you really want to keep something on your own hard drive.
Of course, our Internet Service Provider keeps security copies of the forum, in case of a major issue.
I hope this reassures you.