ok ok. I was once where you were and i don't want you to get addicted to coffee reading that usb dongles thread. First you have to buy a usb adapter like:
http://www.electronicproductonline.c...oducts_id=2004
or
http://www.amazon.com/Motorola-Micro..._sim_e_title_2

Now from this you can buy an adapter than can convert usb to ethernet.
http://www.electronicproductonline.c...oducts_id=1799

Now once you've gotten all this go to the wiki and read the HOWTO on Wired Networking
http://www.internettablettalk.com/wi...de_and_OS_2008