Orinoco Gold and Silver Wireless Cards
One of the best, or simply the best WiFi card ever made to the public, is the Orinoco Wireless PC Card.
It has an outstanding performance, and I have used it from various tasks, ranging from Warwalking, wardriving with laptops, pocket pc with pcmcia expansion kits, to working as the sole network adapter on a wireless server of mine. Besides that, it works great with a bunch of software, like Kismet, Netstumbler, Ministumbler, Airsnort, Aircrack etc.
The Orinco card has a security level that provides 802.1x authentication and encryption up to 152-bit WEP. It includes a built-in connector for an external Range Extender Antenna for longer distance connection. I have been using the Orinoco cards since late 2001, and am one really satisfied Orinoco user.
So if you are looking for a wireless card that really works, go Orinoco. Unix/Linux, Microsoft Windows and Mac OS, Pocket PC, Windows Mobile.