i read it once on a website !!!

It say you can use one of the two port as your server port.. Suitable for lan gaming or intranet in your lan... The another port is for direct connection to your modem..

However, there is a very good reason why it good to have 2 lan port !!! You can have, what they call port sniffing using your 2 lan port !!!

You set one lan port to your wireless or switch and another to your modem ! Then you can run MSN siniffer, HTTP sniffer, POP3 sniffer software on your pc which have those 2 lan port ! Then you can spy on your friend MSN chat and even steal their password !!!!