I disagree about the forum, Betsey - I think this is the right place for anyone who is going through divorce issues, as people here have experience and advice to offer.
I haven't read your thread yet, but I do agree with Bets that you need to lawyer up. Once she enrolls the kids in school in her town, you'll have a more difficult time getting 50/50 custody, I should think (and it wouldn't be very practical anyway). I don't know if you are prepared or able to be the primary custodian, but if that's what you want, you will need a lawyer to help fight for that. Your work status and hers may influence the courts (if she's a stay-at-home mom, they'll probably let them go to school where she is.)
Separate out your feelings about wife and divorce, and just ask yourself what is best for the kids? If it seems inevitable that they will live with her and go to school there, you may not want to make waves. On the other hand, if you believe they would be better off living with you and seeing her on weekends, get a lawyer ASAP, one who is experienced in fighting for father's rights.