NC cleared in 3/07
I did almost everything that other people did, except WOM (but already consulted lawyer, fees, materials and everything, which means, if by 4/07 my NC has not cleared, I'll file WOM):
frequent contacts with USCIS, email, call, Infopass, Service Request, etc
congressman, senators, FBI, etc.
recent couple of months, I am a frequent caller to NSC.