WiFi
What card are you using? If you dont know, you can often find out during boot, when a message similar to "Unsupported wireless card: <wireless card here>: visit www.linuxwireless.com/en/users/driver/<your wireless card here>" may appear.
You can also leave linux connected via ethernet cable direct to your router. You can then connect to the internet and usually get the driver through an automatic update.
Also, throughout all this keep an eye on the Hardware Drivers Manager. If you see a driver for wireless cards in here enable it. It can be found in KDE>System>Hardware Drivers Manager
Have ya tried turnin' it off an' on again?
This post has been edited 1 times, last edit by "Abstract" (Jun 4th 2008, 8:41pm)