I've previously read that Mac has told some recruits that he knows who the new coach is but couldn't announce it yet. Now rumor has it that he is still interviewing people this week. I don't think he would flat our lie to recruits like that. My guess is that Mac had a guy he wanted to hire, a deal was almost made, but the guy changed his mind leaving Mac to do a new search. Now that it's a crucial recruiting period, he hasn't been able to dedicate as much time into this hire as he or any of us would like, which is why it is taking so long. I'm sure if he had his way, Coach Mac would of had a guy hired weeks ago.
I don't know this as fact. Just my personal speculation as to what is going on. Another guess that I have is that we'll know who the coach is at this time next week, maybe (hopefully) sooner.