use taxonomy for organic groups To lock down access to nodes based on OG's, I have implemented a taxonomy as a group. The users can then can select that taxonomy and access level for each content. Is anyone aware of pitfalls I need to watch out for doing it this way?

I apologize if this is out of scope for this site.
I apologize, but I am trying to do something similar.

OG_Menus, taxonomy_menu have seemed to provide a solution. nodeone.se provides a warning, it's unclear if it's been fixed or not. also look at simpleaccess and taxonomy access control.