I finally got it fixed. Part of the problem was the card. I went and got a $20 netgear card at Fry's, installed it, configured the network and internet. Bingo. Thanks!Well, the SIS900 is supposed to be supported, maybe your revision isn't. Try this to see if you can get it working.
You will need to be logged in as root.
Open /etc/modules.conf in a text editor, add this line
alias eth0 sis900
Save the changes and exit. Then at the shell prompt type:
See if you get any errors. You can see what modules are loaded with: