Wireless PCMCIA Cards belong to three Categories.
1. I use the Wireless Computer in the same room or in the next room within 20? and no ?bunker? walls.
2. I am pushing the edge, i.e. more then 20? and more then one wall.
3. I am having few heavy walls and I need to be more than 60? away.
Condition 1. Buy the least expensive card you can find.
Condition 2. Buy Orinoco Gold.
Example:
Proxim ORiNOCO Gold PCMCIA - 802.11b - 11 Mbps. $59.69
Condition 3. If you are using a regular setting of Entry Level Router or Access Point, do not bother to buy any card.
Distance numbers are approximation YMMV.