Just for interest sake you can see the USB network hub here:
http://www.belkin.com/networkusbhub/
The whole thing didn't make much sense to me either, that's why I didn't buy any extra peripherals yet - and such an obvious issue that everyone overlooked - 3rd party firewall - Unbelievable! Now I am battling to get the firewall to work with this setup so there'll be some sort of security at least.