Here is how I got eth0 to work with this image.
When it first loads and you do a ifconfig -a, eth0 does not show up in the list because the driver is not loaded.
So you need to load the driver: modprobe sunxi-gmac
Then you need to edit the /etc/network/interfaces file by ' vi /etc/network/interfaces ' and add the following two lines
iface eth0 inet dhcp
Note: nano is not available so you have to use vi to edit. A cheat sheet for vi use is here: http://www.lagmonster.org/docs/vi.html
Then you ' ifconfig eth0 up ' and then ' ifup eth0 ' and you should be good to do a ' sudo apt-get update ' and ' sudo apt-get dist-upgrade '.
You'll need to add the sunxi-gmac module to the modules folder in order for it to load at next boot. And with this image, you really should transfer rootfs to SATA or microsd right away as you will run out of storage space quickly.