[texhax] Justification through glyph variants

[Karl Berry]

    pt> Is it not the case that some, if not all, of Thành's microtypographic
    > work has now found its way into XeTeX (either production or beta) ?

Yes.  Thanh integrated pdftex's margin kerning into XeTeX as of TeX Live
2010, that is, XeTeX 3.1415926-2.2-0.9997.4.  Documented at
http://www.tug.org/texlive/doc/texlive-en/texlive-en.html#x1-790009.1.7

Font expansion and other microtype features are not implemented.  (And
would require "real work" to implement with system fonts.)  

    ms> But XeTeX is mostly unmaintained these days, 

That is true.  Jonathan K clearly has essentially no time any more.
Thanh said he would work on bugs in the margin kerning, but can't offer
to do anything else.  

There are several important long-standing bugs, and (Mac only) it would
be highly desirable to move from ATSUI to Core Text.

So, if anyone has ability, inclination, and (perhaps most important)
time, much could be done.  It's conceivable that there is some "bounty"
money available if that makes a difference.

karl