I called NVC today and got a message that my packet left from NVC on Jun 10, 2008 on the way to HCM consulate. Do I have to call the HCM consulate to do what next to do or I just wait for they send the instruction? Anyone have the same my timeline and when expect the interview day? I am so worry about the interview which I hear that it will be very diffcult now in HCM consulate.

Is your case CR1 or K1( fiance) ?
If your case is CR-1, NVC will send to both you ( you and your wife) interview letters. You don't need to call the U.S. Consulate.
If your case is K1, the U.S. Consulate in HCMC will send a instruction packet to your wife in Vietnam. I think you'd better call the Consulate to know informations every week.
Good luck.

Thank you, my case is CR1.