The PA-RISC Linux website moved to the Wiki at http://parisc.wiki.kernel.org
Read those instructions if you want to install Debian Linux on a PA-RISC machine.
FTP file download at ftp://parisc.parisc-linux.org/
Old Mailing list archives are here.
This machine is used as Debian Linux buildd server.
An overview of all build servers can be found at http://unstable.buildd.net/index-hppa.html
Current status of Debian unstable on PA-RISC is at http://buildd.debian-ports.org/status/architecture.php?a=hppa&suite=sid