As you should know, the Massachusetts General Court (Legislature) is meeting as a Constitutional Convention today to consider anti-gay-marriage constitutional amendments. So far, the first such amendment has been voted down.
After first being gavelled down, (Massachusetts) House Speaker Thomas Finneran's anti-gay-marriage amendment was
defeated by a recorded vote of 100-98 this afternoon. The Boston Globe says a two-thirds majority was needed to pass it. Why isn't immediately clear, although it may be because it was first defeated on a voice vote. Although the report isn't clear, 100-98 may have been the margin on a vote to pass the amendment, meaning it fell short of a majority of the 200 total members (199 present; one vacancy) by only one vote.
Finneran's amendment would have defined marriage as a heterosexual institution but allowed the legislature to pass legislation establishing civil unions but would not itself have defined civil unions. This amendment wasn't announced until the Convention convened.
Next up is the controversial bi-partisan compromise amendment, which would define marriage as heterosexual, define civil unions, and retroactively convert any existing same-sex marriages to civil unions.
The Globe has the text of all the amendments.