I realize this is a bad idea, but in my application I think it will be
Good Enough(tm).  In my fiancee's apartment I have a Cat5 cable running
from the living room to the geek lounge.  The cable modem is in the living
room because there's no cable TV connectors in any other room.  I now want
to put a WebTV type component into the entertainment center but it needs
to be inside the firewall.  Is there such thing as a Y adapter that I
could split 1 Cat5 run into 2 ethernet lines?  Yes, I realize it would
break the standard but seeing as how one line is connecting to my cable
modem (2 Mb/sec max) and the other will be 10 Mb/s, it should work.  Does
anybody sell these or is this just a dumb idea and I should have no
business trying?

-Brian