The college football fan in me hopes everything is OK and can appreciate that health and family come first. I've obviously got a soft spot for Urban after what he did here at Utah.
The conspiracy theorist in me, however, isn't surprised even a little bit by this move. He's an amazing coach and motivator, but seeing how bare he left the cupboard when he bolted for Florida, I don't think he can recruit worth a lick. His MO is to come in somewhere that is primed for success (i.e. Bowling Green, Utah, Florida), kick them up a notch to achieve it, then leave before his recruits really start to play. I had a strong suspicion that he'd be gone once Tebow was done, and since the ND job wasn't in good enough shape right now for him to take, he'll just take a break until a better opportunity presents itself.
My prediction is Bob Stoops to Florida with Gary Patterson (TCU) filling in as Stoops' replacement at Oklahoma. Either that or Chucky (Gruden) giving the college game a shot.