Arch Hurd offers Hurd LiveCDs at http://www.archhurd.org/download/.
A less recent Live CD can be found at http://teythoon.cryptobitch.de/hurd/livecd/hurd-live-install-1273300101.iso.xz.
It can be run with qemu via
$ wget http://teythoon.cryptobitch.de/hurd/livecd/hurd-live-install-1273300101.iso.xz
$ xz -d hurd-live-install-1273300101.iso.xz
$ qemu -m 512 -cdrom hurd-live-install-1273300101.iso
These LiveCDs should be useful for those who want to try out the Hurd before they commit to installing it on their hard disks. In addition to that, the bootable Hurd CDs should enable us to have a native installer instead of relying on Linux.