Zlatan,
Sorry that just cannot happen - Emerson has a contract with Roma, and if he signed pre-contract written agreement with Moggi then both he and Juve would breach his current contract and thus liable to compensation. In Emerson case, his career might jeopardized through lenghty suspension, which I would guess would run minimum a year.
There was a similar case in NBA involving Joe Smith and Wolves, and in the end both parties got penalized.
As far as I am concerned, Emerson is refusing to move to other teams other than us because 1) he is a man who abide by his words and 2) he may enjoy great rapport with Capello. I remember Don Fabio once said, "Emerson is the kind of player you build the team around".
And there certainly isnt any written pre-contract agreement with Emerson, otherwise we in trouble. Hence, I reckon Moggi would be wise to give in extra couple of million of $ and conclude the transfer soon.