tl;dr: Run:
qemu-system-i386 -vga std -m 512 -cdrom http://toaruos.org/netboot.iso -M accel=kvm:tcg \
-soundhw ac97 -net user -net nic,model=rtl8139 -serial stdio
ToaruOS has a reasonably stable network stack under VirtualBox's and QEMU's user network modes, and we already run ramdisk-based systems on CDs, so why not write an application that gets that ramdisk from the network and have that be the only thing we ship?