I was briefly involved in this project, I wrote some code for instruction selection, was active on the mailing list and had a few lengthy discussions about dataflow programming with Adrian/Ulitmus. Last I heard, in early 2011, he was still working on it, but in private, and he had changed focus somewhat to something even more ambitious. I voiced my concern over raising the bar before the first simpler version was released and feature creep, but I guess his mind was made up. I haven't heard anything since, despite trying to reach him a couple of times :-(
So, from this, I would say that ANI can safely be assumed dead unless a working compiler is surprise-released.
I dunno, mlton was of that order and that was ages ago.