richms: This is the other board I got - not sure if its real POE or a hack job - http://www.aliexpress.com/item/IBOARD-W5100-Ethernet-Module-Development-Board-with-POE-Xbee-and-SD-Card-Slot-Expansion-Free-Shipping/2017150060.html - has enough headers for enough useful things.
the price of that is right. is that a full arduino board or do you need something else, or is that a arduino clone and works similar?
I've never used arduino's before, so complete n00b at them. want something very basic that I can connect to network and can very easily (cause of my n00b status) connect a few sensors to. size only matters if its a wifi type board, if its got ethernet I'll probably put it in the roof and drill a small hole in the ceiling for some cables for the sensor.
also want to learn this stuff so when my sons a few years older I can teach him this sort of stuff (hes only 5 now).