Remember those two cases from Massachusetts about DOMA? To summarize, a Federal District Judge found that it was illegal for the US government to discriminate against same sex married couples by denying them benefits given to married couples, and he overturned the section of DOMA that forbids federal recognition of married gay couples on grounds of equal protection and state sovereignty.
As pointed out by Chris Geidner and Lisa Keen, that judgment has now been formally entered. Which means the clock starts ticking: Obama's DoJ has 60 days to file an appeal.
I will rely on my legal friends to correct, but my understanding is that if the DoJ do NOT appeal, that section of DOMA no longer applies to Massachusetts couples. It does not affect anyone else. If they DO appeal, it could bring down section 3 of DOMA in the whole 1st circuit. And of course, if SCOTUS got to it, it could potentially have national implications.
The same ticking clock applies to the Prop8 case, of course; I do not think that judgment has been entered. But there's an election this year in CA, and if the judgment is NOT entered soon, then a new governor or attorney general could decide to appeal. So the two sides of the Prop8 debate better pay attention to the candidates and get involved in the messy business of CA state politics, because it matters.