Step 411n Card
iImage Information

I've fitted the MacBook with an 11n card from a Mac Pro. This, as well as the Apple Rainbow Logo is warranty voiding territory. They are the same interface (PCI-E v2 or something) and can be swapped out, but it means going into the MacBook and exposing the Logic Board. To be honest, I wouldn't recommend this to anyone unless they knew exactly what they were doing. Apple portables have a lot of hidden screws and latches that could easily brake if you don't know what you're doing.