i tried cingulars wirless network access card for a laptop that plugs into a slot on laptops.
was supposed to be 100kbps, could not even get it to work, cingular had no idea how to make it work. i sent the network card back to get my money back ($160) and a year later i am still trying to get my money back.
my advice for wireless network cards would be go to a store and have them install and get it working before buying. it is to hard to deal with a company over the phone .
link goes to example product.
http://onlinestorez.cingular.com/cell-phone-service/cell-phones/cell-phones.jsp?v=1&q_categoryId=2283000008&q_deviceId=cdsku9870090&WT.svl=mod3