Asciidoc -> docbook -> PDF tooling

I am working on an AsciiDoc -> DocBook -> PDF toolchain for an open source project (so all tooling must be freely available) because the direct AsciiDoc -> PDF toolchain is inadequate for our purposes.

I currently have a java/maven-based AsciiDoc -> DocBook -> FOP -> PDF chain within the docbkx-maven-plugin, but would like any suggestions that appear to be better maintained and are cross platform.


Randall Wood