probable reason for FP delay
I read somewhere that USCIS is running behind on FP so they are issuing FP documents within 45 days of processing date. So, you should expect your FP paperwork when their processing times for I-485 approaches Mid Jan 05 which will take another month or so... hope things move as fast as its been moving.
My RD is March 9 and ND is march 11 and I was in the same boat until 06/02/05.
CIS sent FP notices on May, 31, 2005 and we recieved them on 06/02/05. My situation corroborates above finding.
Hang in there friends.
-Srinivas