Yes the Jaycar reference was the thing at which I was looking.
So reading the first reply, that board ONLY does POE and isn't a HUB. Drats! (kinda)
Ok, it seems doing it that way will be more complicated than I thought.
I won't persue it.
No worries.
Thanks for the replies though.
Networks are also very new to me. Though I do have a gigabit network, I kind of found the switch in a bin, and semi-fixed it to work. (It's a D-link so basically it is junk, but as some of my devices support gigabit, why not use it?)
So just to check again:
The arduino Ether10's POE is a power INPUT.