Divorce Support Forums: what do I do now?

Please help if you can!
I have been divorced since 99. We have joint custody of our 14 year old boy. I have had a reasonable relationship with my ex for years. We are both happily re-married. Two years ago, I was forced to move. I moved about a half an hour's drive away from my ex, and he flipped!! He sued my for full custody, and lost. He sent horrible text messages, sent hate mail to my employer, and is just all around nasty. We just finished with court (the full custody issue) in January, and he immediately put his house on the market and told me he is moving an hour away. Joint custody will not be possible because neither of us will be able to take our son to school in the other's neighborhood due to the distance and travel time. My ex has told my son he has to choose who he wants to live with, which he does not want to do. He wants us both.
1. should I contest his move?
2. if so, when? The house he told me he's moving to has already been sold to someone else, and he's not giving me any updates on where he plans to g0, other than "really far". His house is not sold yet.
3. What will a judge say? I know he has every right to move, but so far away that my son has to choose who he lives with? That's so unfair to him, especially since he is happy with us both.
Please tell me what you would do. Thanks in advance- fire

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