Wireless Internet simply means Internet access with out wires. With this you can connect all you wireless enabled or your WiFi devices to the Internet. Connecting to the Internet were done the wired way in earlier times for laptops and computer. Wireless Internet facility lets you go mobile and you have connectivity for all your WiFi devices.
The answer to the question, “What Do I Need For Wireless Internet?” is really simple. First you need to have at least a broadband connection, these days you should never compromise for nothing other than a broadband. Most Internet Services provides get you modems at the time of installation, that means the connection would be wired and you need to connect each computer by making use of Ethernet cables. But you want to go wireless, so the best thing here would be to install a router. You can bring in a wireless router between the modem and your computers or your other WiFi enabled devices, so that you can have Internet access made wireless. When you get a router, be sure to install something that is new and not an out fashioned slowcoach, hesitatingly Internet delivering router. So go for n-routers, they offer you the best of speeds. Now it should be noted that your computers do have a wireless network card installed or there is no point installing a wireless router, maybe you can use that only with other WiFi devices, and you may need wires for your computer.
Apart from installing a wireless router, you have lot other options to have wireless Internet. Most carriers got facilities like USB modems or laptop cards getting you wireless Internet and advanced devices like MiFi gets you Wireless Internet for up to 5 WiFi enabled devices.