Rich,
We're in the process of updating the OG documentation (as well as an overhaul to the site in general).
The recent changes from Facebook have actually made things much easier as you don't need to create the actions/objects on their site first. You basically can skip that section of the guide and jump to doing it yourself. For the action and object names, you basically call them whatever you want and Facebook will automatically create them in your Open Graph area once you try to publish them.
I hope that explains, but if not, let me know. We'll gladly walk you through the process if you run into any issues.
The new site and documentation will (if all goes well) be online in about 1.5 weeks.
Thanks,
Alex