They're coming, and better yet they're coming with copious amounts of Fractal Grinding, à la Manor Varnish... Just look around in the early parts of that dungeon, the model for Mannequins seems to already be there, I imagine they're just working on letting us Glamour them (since apparently using furniture for storage is a big no-no, according to this dev team...), I kind of hope they're also working on a few poses to set them in...
