For a 100% libre kernel, I feel like this is the more sensible option than Hurd, just to take advantage of all the effort that goes into the Linux kernel. I'm not knowledgeable on kernels in the first place though, so maybe a micro-kernel really is the best way to go once you figure out the proper architecture.
From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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