Can you go wireless? Usually any wireless router has only 4 Ethernet ports, but can handle more computers and other devices wirelessly. For instance, I only have one computer and one PS3 slim in the bedroom hooked in via Ethernet CAT 5e. All other computers and devices are connected wirelessly. In my case I have 4 laptops, one Xbox 360, one fat PS3 in the living room, and my iPod touch.
Anyhow, take a look at this 8-port wireless router, a D-Link DIR-632 Wireless-N 8-Port Route
. However, I cannot say if this router is any good, but I hope this chit-chat can help you.