I think they're working on something as well. But just in case, MATE are experimenting with Wayland using Wayfire as the compositor, which is funny given that Compiz was very popular with GNOME 2/MATE back in the day and Wayfire is very much inspired by that.
I'd think so, otherwise it would've been dropped by a lot of the major distros by now. They don't have a specific community like the XFCE forums, though they do have a dedicated wiki.