If the reason you want an internal wifi card becasue you do not want to have an antenna sticking out of the PCMICA slot, you will like the x-jack:
http://www.3com.com/products/en_US/d...&sku=3CRPAG175
Its a PCMICA Wifi card with a retractable antenna, so when you need it, the antenna will pop out, when your done, you can pop it in, without taking out the NIC.
Hope it helps, Paul