Yes. It has been done. I have heard that the wireless n card for the mac pro will fit the macbook pro. I haven't done it yet though...I'm undecided about whether to update my laptop so i'm going to wait a while before i void my warranty.
An apple dealer have offered to perform the installation but can't guarantee it will work, and say it will void my warranty but that's up in a month anyway... I'll let you know if i do it.