Getting started to the Hydra is pretty straigthforward: once you've plugged it in and installed the software from Razer™'s website you're ready to play.
However you will not be able to fully customize your experience until you install Sixense™'s Motion Creator™. This software can replace the original Razer Hydra Configurator since it will manage your configurations and activate them when needed.
I got the tools, what now ? Edit
This wiki has just started and is impressively empty. I suggest you go to the Sixense™ Forums, here are some links you might find useful:
Also, feel free to come back and share!