OK, you are going to need a wireless driver.
Try
http://atmelwlandriver.sourceforge.net ; The site has a compatibility list of devices you can use with the driver.
To install the driver, you will need a kernel patch (it tells you how to install it on the downloads page). You will then have to download, extract, and compile the driver after you install the kernel patch.
http://www.linuxgazette.com/issue38/pollman.html can help you compile it.
Good luck.