Question came up at the meeting after the meeting last night about where the
Hosts file is on Windows 2000/XP.  I have tested on my XP Home machine and
can say that it's c:Windowssystem32etchosts

In Cygwin, I have set up a symlink thusly:

$ ls -l /etc/hosts
lrwxrwxrwx    1 500      544           147 Jul 17 13:56 /etc/hosts ->
/cygdrive/c/Windows/system32/etc/hosts

allowing me to manipulate the file there and have it actually work.