why not?
You can file family-based 485 and employment-based 485 separately. So INS allows multiple applications for AOS. As a follow-up of my previous message, my colleague applied his 485 with his wife as dependent, while his wife filed her 485 with him as dependent. Everything went fine. He got receipt/FP, etc. His wife got approved earlier, so he got his passport stamped also, without any problem. His own application was terminated automatically.
Although I don\'t suggest people doing that way, I don\'t think we should rule out such option either. Double-check with INS if people really want to pursuit. Don\'t take my word blindly.