Laptop with 2 network ports?

Does anyone know of such a beast? I’m looking to “downsize” my LAN, in power consumption terms; and I’d like to replace the firewall server with a laptop I don’t need a massively powerful machine, any P4 based lappy will do.

Replacing the other servers is no problem, as each only needs 1 NIC; but ISA Server really needs 1 Internet NIC & 1 LAN NIC to function properly.