GNU Hurd 0.6, GNU Mach 1.5, GNU MIG 1.5 released.
If you want to give the Hurd a try, you may easily do so with Debian GNU/Hurd.
Please read the FAQ. Bug reports should be sent to bug-hurd or filed on http://savannah.gnu.org/bugs/?group=hurd. Requests for assistance should be sent to help-hurd or filed on http://savannah.gnu.org/support/?group=hurd. You can also find us on the Freenode IRC network in the #hurd channel.
The GNU Hurd is the GNU project's replacement for the Unix kernel. It is a collection of servers that run on the Mach microkernel to implement file systems, network protocols, file access control, and other features that are implemented by the Unix kernel or similar kernels (such as Linux). More detailed.
GNU Mach is the microkernel upon which a GNU Hurd system is based. It provides an Inter Process Communication (IPC) mechanism that the Hurd uses to define interfaces for implementing in a distributed multi-server fashion the services a traditional operating system kernel provides. More detailed.