Antony Dovgal has pointed out that the latest builds of the PHP documentation using the new PhD system have been put online.

Feel the difference:
With the old OpenJade/DocBook it took 40-60 minutes to build 'many htmls' version of the manual.
With PhD it takes less than 2 minutes to build all three formats ('phpweb', 'one big html' and 'many htmls').

You can grab the latest version of PhD to work on your very own docs either from their CVS repository or download them from the Docs section on the main PHP.net website.