My thoughts?
Fairly simple, he's interested enough to be mulling over the final contract and/or already committed. Remember, we keep hearing an MOU was signed. HearForGrumors and CWV (and the other lawyer types that deal in that area that I might have missed) can shed better information on how many times someone backs out after negotiations have gone that far, but I'd dare say the percentage isn't high at all. Because when two parties agree in principle on something and the details just need to get ironed out, the details tend to get ironed out. One side knows how bad the other wants it and are playing the process (Beaver alluded to this I believe) to get additional concessions and the other side eventually relents or counter-proposes in the middle where the other party really wants to be.
An analogy would be those of us .mil folks that have been deployed to the Middle East and seeing the off base vendors with the fake Rolex watches. The vendors start at a price of $100 and maybe they get it. But generally? They are willing to settle for about $20 or so. But they always start at the ridiculous levels because of the PT Barnum rule.
Gruden very likely has a smart agent. He'll start at the ridiculous level, but be willing to settle for something a little less. Currie knows this and is willing to give up a little on that front as well to meet in the middle where he knows it will end up. But you never start by giving the mouse a cookie. You haggle, negotiate, propose, claim unreasonableness, maybe even walk away for a short while, come back and give in slightly, let the other side give in a little and eventually end up where they wanted and you are willing to give.
Something our politicians in Washington have forgotten how to do. (and that's a non-political statement) But anyway...
Gruden hasn't flat turned us down nor shot it down yet because either the process is so far along the minor details are going to be ironed out or are so petty they won't affect the overall outcome. And the outcome?
He's agreed in principle to be the next coach at UT. He knows it, Currie knows it, Peyton and Fulmer know it (notice how suspiciously quiet those two are?), the money men know it and they know the deal will get settled if it hasn't already.