We've recompiled our PL/V8 for windows against PostgreSQL 9.2.0 (both 32-bit and 64-bit) with latest PL/V8 code. This includes the additional LiveScript language, which you can use by doing:
CREATE EXTENSION plls;
New release also includes some bug fixes such as Crash case with non-array in array returning function.
We have also put up binaries and installers for PostGIS 2.0.1 for PostgreSQL 9.2 (32-bit and 64-bit) downloadable from PostGIS website. We haven't deployed the installers to Application StackBuilder yet since we are doing some testing before we release to the masses.