Gabriel Cheong, a lawyer in Massachusetts, has a good blog post about the options for divorcing couples when their house is underwater (or in other words, worth less than the amount owed on the mortgage).
He describes (in greater detail than here) 6 options:
1) Live there together until one can afford to move out or refinance.
2) Continue to own the house with one person living there.
3) Refinance.
4) Short sale.
5) Foreclosure.
6) Work with your lender to modify your mortgage.
Another option is for both parties to file for bankruptcy. This would in all likelihood be very messy but if saving your house is a priority, it might be possible under certain situations. You should consult with a bankruptcy lawyer to see if this might be helpful for you.
The other idea that comes to mind, of couse, is to dismiss your divorce or not file for divorce until you can get your home situation straightened out.
Clearly, none of these are ideal choices.
Check out Gabriel’s blog at Massachusetts Divorce and Wills Lawyer for more helpful ideas.

now a days it is vital to have a full understanding of divorce laws. Nearly 40% of all marriages will end in a divorce. Therefore, it is very important that you know the ins and outs of the laws. Divorce laws do vary from state to state so it is important that you check with the laws for your particular state
http://legallaw.sosblog.com/admin.php?ctrl=posts&tab=posts&blog=1&post_id=42#form_comment
Posted by: David hogard | November 06, 2009 at 07:01 AM
Its a nice blog posted by you. I was seeking for this type of blog that have a fresh and interesting content.
Divorce Lawyer
Posted by: Divorce Lawyer | January 08, 2010 at 10:30 AM
Your article is now more important than ever. 6 months later and no positive change in the real estate market.
The following article is from a real estate lawyer in Santa Barbara
http://www.bankruptcy-law-help.com/Underwater-Properties.html
Posted by: RonnieM | March 30, 2010 at 09:04 PM
It's so important to get a current appraisal to find out in advance what your home's value is. This way you can add it into the assests/debts that are to be divided in the divorce.
James Mucci is a MI refinance professional
Posted by: James Mucci | April 26, 2010 at 10:02 PM
Divorce is very painful, it is even more painful if you undergo this process and you are being treated unfairly. This is why learning more about it and seeking professional advice from those who are trustworthy can be very helpful as you go through this painful phase.
Posted by: defense attorney Delaware | September 28, 2011 at 08:09 AM