The USCIS posted the below notice (copied from USCIS.gov). This is a very important update and procedural improvement. At this point, the new rule below applies only to people who are currently abroad. It is hoped that the rule will be applied to the people in the US in the near future, the comment period is still pending. Please ignore my previous words. The big date for this implementation is June 4th, 2012– Tahmina
USCIS to Centralize Filing and Adjudication for Certain Waivers of Inadmissibility in the U. S.
U.S. Citizenship and Immigration Services sent this bulletin at 05/23/2012 11:47 AM EDT
Beginning June 4, 2012, individuals abroad who have applied for certain visas and have been found ineligible by a U.S. Consular Officer, will be able to mail requests to waive certain grounds of inadmissibility directly to a U.S. Citizenship and Immigration Services (USCIS) Lockbox facility.
This change affects where individuals abroad, who have been found inadmissible for an immigrant visa or a nonimmigrant K or V visa, must send their waiver applications.
Read the News Update.