There are no plans for me to develop for ElkArte. However there is a fairly similar code base. If ElkArte has compatible APIS to all the old SMF calls, it may work with some manual installs. The new version wrote for SMF 2.1 most likely won't work with ElkArte as it makes use of way more hooks, and ElkArte would have to implant those hooks to function.
That said, SD is open source software. Anyone could fork the project and develop it for ElkArte.
That said, SD is open source software. Anyone could fork the project and develop it for ElkArte.