I married my same-sex spouse & now live in Texas. Can we file a joint bankruptcy?

Yes.

The U.S. Attorney General Eric Holder announced today that among other things, the U.S. Justice Department will not oppose same-sex married couples filing bankruptcy together, in what is called a "joint filing." This can save couples from having to file two separate bankruptcy cases, requiring two separate filing fees and two separate attorney fees.

The announcement was made at the Human Rights Campaign Greater New York Gala. The remarks concerning bankruptcy were:

In bankruptcy cases, the United States Trustee Program will take the position that same-sex married couples should be treated in the same manner as opposite-sex married couples.  This means that, among other things, same-sex married couples should be eligible to file for bankruptcy jointly, that certain debts to same-sex spouses or former spouses should be excepted from discharge, and that domestic support obligations should include debts, such as alimony, owed to a former same-sex spouse.