For users that want to be able to connect to the Internet wherever they may be, a wireless card is a must.
Laptops and notebooks may come with a mobile wireless card installed internally, or you may purchase a PCMIA card (such as a Linksys WPC11 card), which can put in the PCMIA slot commonly found on laptop and notebook computers.
Remember that netbooks already have a wireless card embedded and/or an Ethernet port so you don't have to worry how you'll connect to the Internet.
A wireless card for accessing the Internet without wires.
You can use many of the features of the PS3 through the wireless card.