Since you have no job, are behind in your mortgage, have unpaid property taxes and are being threatened with foreclosure I know that you have been fighting this battle for months.
Short sale is the quick and obvious solution but it may not be the only solution or the best solution for you. I hope that you have already sought the advice of professionals whether that be Realtor, attorney, church counselor, housing advocate or others who are in a position to look closely at your situation and make recommendations.
You situation is dire and your story is much too common these days.
I wish you the best.