I am surprised that it took you three years to get approved. Why it took almost two years from second letter to the actually interview.
Do you have some special issues with your application? I filed my application on May 17, 2004 and got my second letter on July 2, 2004. If I have to wait another two year. Hell... I am rather go back to china to have a normal life. ----life is too short. Tell me why so long???????