Ok... I am going to give you guys some real info. No need for source, because I am the source. All I can say is I am an IT/Comms nerd. I am not a noob either, just lurk alot. Here goes, The truth.
This will not sound like insider info because it's not a rumor, but fact. Nothing is locked. It is close, but still fluid at the moment. Gruden is still a possiblity, but other candidates are being talked to, and other names will surface through out the process. Friday is not a hard date for anything yet, so don't pin your hopes on that. You can tell very quickly who is in play by who has not shot it down yet, like Stoops has and others. When or if Gruden is no longer an option, you will know semi-officially fairly quick. Things are tight lipped and some of that has to do with the fact that, no decision has been made to really leak. All options are being looked at and there is a process.