I filed my case (self petition) in April 11, 2006. Got an extensive RFE in January 26, 2007 with a deadline of April 20, 2007. (details in the following thread with the copy of the rfe):
http://www.immigrationportal.com/showthread.php?t=247091
Replied with response letter answering each and every point and documents April 18, 2007. CRIS mail and LUD on April 19, stating "received rfe response and case processing has been resumed"
On April 30, 2007 received approval notice dated April 25, 2007. But still today (April 30, 2007) no CRIS mail received neither any change on LUD status.
Anyway much happy with it and thanks to all for the positive comments and support.

http://www.immigrationportal.com/showthread.php?t=247091
Replied with response letter answering each and every point and documents April 18, 2007. CRIS mail and LUD on April 19, stating "received rfe response and case processing has been resumed"
On April 30, 2007 received approval notice dated April 25, 2007. But still today (April 30, 2007) no CRIS mail received neither any change on LUD status.
Anyway much happy with it and thanks to all for the positive comments and support.