The [installation](http://www.gnu.org/software/hurd/install.html) page is the logical place to start. Neal Walfield's [guide](http://web.walfield.org/papers/hurd-installation-guide/english/hurd-install-guide.html) is excellent. Items not mentioned elsewhere include:

* The current system install image is located temporarily located <ftp://alpha.gnu.org/gnu/hurd/debian-staging/>

* a recommended /etc/apt/sources.list

          deb ftp://alpha.gnu.org/gnu/hurd/debian-libio unstable main
          deb ftp://ftp.debian.org/debian unstable main
          deb-src ftp://ftp.debian.org/debian unstable main