In case there's a problem with Marconi, you should be able to access the exact same site served from GitHub's servers here: https://github.pldb.com.
If Marconi AND GitHub were to go down at the same time...well that's why it's good to regularly download the entire source code of the site to your own machine! You can do that with:
git clone https://github.com/breck7/pldb.git # Then to keep it updated: cd pldb git pull
We have another server running at Digital Ocean named Build that serves build.pldb.com. Build serves the site and also let's you easily edit the database right in your web browser. If Build is at all flakey, it's recommended you just submit your changes to the PLDB repo using the normal GitHub UI.