GNU Hurd

What do you think of it? It seems pretty interesting. Microkernels clearly are superior to monolithic kernels.

http://en.wikipedia.org/wiki/GNU_Hurd

>>1
Hurd isn't a microkernel, Hurd is GNU's multiserver kernel replacement. GNU's microkernel is called GNU Mach.

>>2
Hurd isn't vaporware because you can actually see and use it today. It's not finished but that doesn't mean it doesn't exist.