Internet sharing with linux and win98 machines

[Sean]

Just for the record because I dont think I sent the reply to the list. 
And a lurker on the list might be interested. 

The 3c450's are supported variants of the 3c905 vortex series cards. 
Here is a nice article by a guy doing the same thing you are trying to do.

http://home.kscable.com/shazam/linux.html

Here is an another article listing the supported cards. Which is less fun
and more technical then the first one. 

http://www.scyld.com/network/vortex.html