Poser 9/Poser Pro 2012 added a couple of extra Python methods, I believe I outlined them in a forum post, other than that all Poser 8 methods are still relevant to the latest version.

Poser 9/Poser 2012 uses a later version of Python but the same thing applies. The manual is over 400 pages long, navigation is very clear thanks to the tree format of the index, a large number of examples (in .py format) are included. It is written in English not geek-speak :)