I like it, Scream! Use those four options as check boxes. The on/off will basically outline which group/user can do what. It adds a great deal of flexibility for the admins and moderators. Excellent idea! I'm all for it!

Back to the groups concept, the groups would be used universally. So you can use the same group(s) throughout the different forums without having to recreate them. Create a group, use it for all or none of the forums - admin's choice.

Regards,

Strategist