Trying to get a wireless card working under Ubuntu can be a frustrating experience if the manufacturers of the card have decided to keep the specs for their hardware a secret, and can't even be bothered to provide drivers for the large percentage of the geek market which runs Linux. Shooting yourselves in the foot, guys?
A little program called ndiswrapper sometimes comes to the rescue - it allows you to use the Windows drivers for your card under Linux. It doesn't always work, but at least you can hope. The process of installing the Windows drivers isn't too user-friendly, however. Would a nice graphical tool help?
This is available in Feisty as the ndisgtk package. Once installed, press System -> Administration -> Windows Wireless Drivers and follow your nose...
Don't forget to visit the developer's blog for more screenshots.