I Just installed Void Linux the other day and so far I have been really impressed. I just can't believe that this distro is so far under the radar!
1) The installer only worked as sudo xbps-install
Both: the installer and the voidwiki tell you about this, though
2) Network: The only way I could get my wireless to work after the installation (it worked fine during the live version) was to reinstall void and skip over the network option in the installer.
Did work just fine for me. Of course, i had to enable dhcpd & wpa_supplicant after installation (you may need to disable those, if you want to use Networkmanager or wicd, instead)
Side Note: If you need a gui package installer they have a program called OctoXBPS which is Voids version of Arch linux Octopi.
That's actually developed by the Octopi-guy himself
He also ported it over to FreeBSD (See: HERE