keep in mind at we don't have Marquis Daniels birds rights, and also that a team only gets an MLE if they are over the cap. Now assuming we resign Rondo, Ray Allen and Eddie House we will be right over the cap again and the MLE will be available, however we will have to cut into the MLE if we hope to resign Daniels. Now if Marquis Daniels plays well this season and we win the title I see no reason that the Celtics would not resign him to a new deal. There's a very good chance that our team will look exactly the same as this year except scal will return on a minimum contract, Tony Allen will be gone and we will have another late first rounder on the roster, and maybe some depth players signed to minimum deals and/or whatever is left over of the MLE after the Daniels signing.
Now back to the theoretical Nocioni trade:
Acquiring Nocioni does not effect Boston Celtics ability to resign any of their important players in the future and doesnt really effect their cap space according to the rules of the CBA and the way the cap works. However, assuming that Boston does not worry about money at all and it willing to take on his contract is completely disregarding any real economic factors. Even though the Celtics owners are willing to go over the cap to be championship contenders, they are not going to be irresponsible in the way they spend that money, and they will not approve a move to add a 7 million dollar/year(14 mill if u consider luxury tax) backup for the next three years. Now let's say that Marquis Daniels has a major injury, then the situation will be completely different, but with the current situation there is no chance he will come to the Celtics... we're not the New York Knicks or the Dallas Mavericks here...