That's the term I've seen/heard on the ground in my neck of the woods since the state Legislature resolved the issue a few months ago. It's still "same-sex marriage" in the mainstream press, although I've seen "equality marriage" in the GLBT and alternative press.

Then again, the use of "equality marriage" in RL could be the people I hang/work with.

I think there may be a push to phase out "gay marriage" and "same-sex marriage" since it honestly doesn't really sum up the reality as well as "equality marriage." Because, really, all GLBT people want is the same rights and responsibilities as every other citizen, right?