Ooh... phantom limbs and nerve-feelingness in other parts of the body. This thread has certainly evolved. Both are really bizarre, but not rare. I read about a woman who had reconstruction surgery on her nose, using skin from her forehead. Everytime her forehead itched, she had to scratch her nose--and vice versa.
Of course, after a while it would swap, an an itchy nose would feel like an itchy forehead. And vice-versa. Since her brain would start recognising the signals from the nose as being from the nose.