I'm using the pre-release testing version of TeXlive 2010. From what I understand from the TeXlive Guide, a new feature is that support for magin kerning has been added to XeTeX.
From what I can tell, it is not enabled by default, though I'm not certain about that. (The effect might be subtle enough that I cannot tell.)
Is it possible for me to enable this when compiling a more or less standard XeLaTeX document? If so, how? The microtype package still throws an error when I try to use it with xelatex. Will there be an updated version of this package?
Will it be necessary to use certain fonts, or prepare/acquire a special configuration file for each font?
Anyway, I can find very little information about this new feature online. Any light that can be shed would be appreciated.