If you do have to purchase a switch, you can also buy a switch / router in one box:

like this one:

- D-Link Home Ethernet Cable/DSL Modem Gateway and 4-port Switch (it can use 100BASE-TX Ethernet on your LAN)
http://www.dlink.com/products/broadband/di704/

If you want more ports and features:

- DI-707 Internet Gateway/Firewall 7-port Switch
http://www.dlink.com/products/broadband/di707/

__ Some other brands __


*** SMC ***
http://www.smc.com
- Barricade 4-Port 10/100Mbps Broadband Router

- Barricade™ 8 Port 10/100 Mbps Broadband Router



*** LinkSys ***

- BEFSR41 - EtherFast® Cable/DSL Router with 4-Port Switch
http://www.linksys.com/products/prod...rid=23&prid=20

- BEFSR81 - EtherFast® Cable/DSL Router with 8-Port Switch
http://www.linksys.com/products/prod...id=155&grid=23