I believe it is possible there may be a connection between the Pakistani Memphis Professor Shafi and the Pakistani Chafi connected to the OKC bombing.
First, these guys often conveniently provide a mispelling of their names.
Second, I read an email by Professor Shafi on the Yahoo Memphis Da'wah praising his Taliban brothers fighting in Afghanistan and wishing them success.
Third, his association with the Islamic extremism put forth by CIS:Resources on Islam and Science.