From http://mumbai.usconsulate.gov/cut_off_dates.html
Immigrant Visas
Cut-Off Dates for Immigrant Visas
We are pleased to announce the October 2008 cut-off dates for immigrant visas for individuals born in India and those born in most other countries.
To qualify for an appointment, an applicant's priority date (the date that the petition was filed) must fall before the cut-off date for the appropriate category.
The following numbers are derived from the Department of State's Visa Bulletin. If you have additional questions about cut-off dates and your case is being processed at the U.S. Consulate General in Mumbai, please e-mail us or call us at +91-22-2363-7407 between 2 and 4 p.m. IST.
Category India Most Other Countries
F1 15 April 2002 15 April 2002
FX 1 May 2001 1 May 2001
F2A 1 January 2004 1 January 2004
F2B 15 December 1999 15 December 1999
F3 22 June 2000 22 June 2000
F4 22 May 1997 22 October 1997
E1 Current Current
E2 1 April 2003 Current
E3 1 July 2001 1 January 2005
EW 1 Janurary 2003 1 Janurary 2003
E4 Current Current
E4-Religious Current Current