Thank you very much for all your responses. To answers your question, I received the receipt number in less than a week after I submitted my documents on May 22, 06 (EB1 category). I have also already gone through the finger prints and have received EAD valid for 1 year. My question is why would USCIS start processing I-485 when they haven't made the decision on I-140? Is not that wait for their time?