Sorry for the delay in my response, I don't pay attention to the wiki much :)
Version 4, the version detailed here is the official, final version.
I was working on a font but the opentype features required to make it work are non trivial and I got stuck. Thus there is no working typeface, but a non-wokring typeface which contains all the correct glyphs does exist. Although it is useless for typing large amounts of text, if you wanted to compose the shapes by hand for some particular project, I can provide this file to you :)