I just put a Dell TrueMobile 1300 802.11g card in my Latitude X200. It replaced a more generic Lucent 802.11b card that I had previously installed. The 1300 is only $49 from Dell. I imagine it would work in your IBM but I'm not certain. I'm willing to sell the Lucent card though if you want something cheaper. When I bought the card off ebay, that's all I got (no drivers or instructions). It uses the generic Orinoco drivers if I remember correctly.