I use Void on my router:
http://penguindreams.org/blog/building-a-thin-itx-router/
It works really well. Runit is an interesting init system. I wish it was a little better documented.
I hope we start seeing hosted providers offering Void base images. I'm a little weary of the current state of Linux distros where everything new seems to be either Debian or RHEL based.