http://boards.immigrationportal.com/showthread.php?t=108916
Actually the documents listed there are over-prepared. According to my lawyer, the only mandatory document for e-file is the 485 receipt.
Some common questions are, "what is the my current status", "what is the status of my last entry". Different people have different answers for that. And it seems to be not very important, because nobody got rejected because of that.