OpenStack
It is possible to run the Hurd as a KVM-based OpenStack cloud instance.
For the time being, you'll have to avoid using virtio drivers, and use emulated hardware instead:
$ glance image-create --property hw_disk_bus=ide --property hw_cdrom_bus=ide --property hw_vif_model=rtl8139 --disk-format raw --container-format bare --name gnu-hurd --copy-from https://cdimage.debian.org/cdimage/ports/latest/hurd-i386/debian-hurd.img