Good for them. Hopefully the Catholic church will follow in their footsteps 2 or 3 popes from now.
You could just convert to Episcopalianism and not have to wait you know...
I'll never formally convert, but I have been going to Episcopal mass with my wife lately. Good thing I never got around to learning the new Catholic mass ("consubstantial with the Father?" come on...), since now I have a third version to learn.
That said, I don't think there's going to be any gay weddings soon in any kind of church around here, Episcopal or otherwise. The Episcopal priest who married us actually made alluded to being against gay marriage in a few comments during the premarital counseling, so I'm really curious if he'll be required to perform them under the new rules, or if the entire Mississippi diocese will be able to disallow them.