We received our OCI cards + U visa sticker yesterday. The Indian consulate, Chicago rocks and has very quick turnaround time.
Our OCI was granted on March 8, 2007 and received by consulate on March 17, 2007. Mailed US passports + Indian passports on March 19 and recd by consulate on March 22. Reced cancelled Indian passports + OCI Registration document + U visa affixed in US passports on March 30.
My experience in dealing with the Indian consulate in Chicago has been very positive and they have been very prompt in responding to email queries.