The AP is reporting that the Massachusetts Senate has voted to repeal a 1913 law banning marriages between non-residents of the state. That law was originally passed, if memory serves, to prevent the state from becoming a hotspot for interracial marriage, as Massachusetts was unusual at the time for allowing people of different races to marry. Obviously, the impact of changing the law could be huge: gays from virtually any state could get legally married in Massachusetts and then sue their home states for not recognizing their marriage. It's not difficult to imagine this going to the Supreme Court.
The repeal must also be passed by the Massachusetts House and then signed by Gov. Deval Patrick, who has an out lesbian daughter and has indicated his support for the bill.