there are some whip antennas available that you can attach to your car. Compusa (i hate em) has an excellent selection to choose from. For Wardriving, you'll want a good omni-directional antenna. Sometimes, as in the case of the airport 802.11b cards, you won't have the right adapter to fit the antenna to the card. There are numerous sources online that can sell you the right pig-tail adapter. I had to do that with an airport base station. Adapter costs about $7 if you need it.