I'm still around, though as you can see I don't check in as often as I might. >.<
My quad has been together for three years and has gone through some changes. While we still consider ourselves family, my other male partner (Sunday) decided he was going to be monogamous (which probably doesn't surprise anyone who read my posts, the writing was probably on the wall).
I'm not sure I qualify as a wildly successful quad. None of us are actively pursuing romance outside of our individual marriages at the moment, as we don't seem to have time, energy, inclination, or all of the above. We live in seperate households, and truth be told, I don't want to move in together. Sometimes we fantasize about a duplex, though.