I'm glad Popovich, Harvey, et al. are reinforcing what most of us have been saying all along: Manu is not going to be traded, barring "an offer that they can't refuse."
As I've said before, I wouldn't wait until the end of the season to start talking about extension/new contract. Make sure he can get through training camp and the first month or two of the season, then get it done. That way you don't worry about competing bids over the summer, and you can use the "threat of injury" argument to shave off a million or two. Negotiations in March through July creates too big a threat of distraction or losing him.
The two year contract that Harvey suggests makes sense. I've been saying 3 years for a while now, and I think you can get him for a decent amount less per year if you throw in that extra year.