Linux Router Project:
http://www.linuxrouter.org/
ftp://ftp.linuxrouter.org/
linux-router@linuxrouter.org
Developers-only site:
http://www.psychosis.com/linux/linux-router-devel/
Initrd-Archive (untar) kernel patches:
ftp://ftp.psychosis.com/linux/initrd-arch/