As is mentioned in this post to the PEAR blog the server hosting the packages and website has been fully restored as of December 11th and should be 100% functional again.
Our server sponsor eUKhost quickly provided us with a new machine after we told them the old had failed, and the last two weeks were spent setting it up to provide the same functionality as before.
This includes not only the pear.php.net site but also the bug tracker, manual and downloads handling. They share a bit about why it took so long to correct (mostly having to do with technological difficulties with the server provided by the host). While backups did exist, they were only for the packages themselves and XML file structure. Unfortunately this did not include the website and blog database or patch files in the bug tracker. The remainder of the post lists several other smaller things that went wrong in the process, all adding up to plenty of difficulties for Christian as he battled to get the server (and services) back up and running.