Hi L33t,
Every Macbook model comes with built in AirPort Extreme wireless connectivity.
If you go to your system preferences, and go to into network you should be able to see and enable the AirPort adapter.
In most cases its also visible in the upper right corner of your screen, next to the audio indicator in the menu bar.
If you're using OS X 10.5, the moment you click on the AirPort icon, provided that AirPort is on, it will scan and show you the available networks in your area.
Those that have padlocks in the right side are secure networks that require a WEP or WPA password to connect, but chances are you'll probably have one or two unsecure networks that should allow you to connect (depending on location and how friendly your neighbors are).
Good luck! Itay.
