I have been playing with various role-limiting plugins, and I find Role Scoper to be the most complete. For current versions of my webcomic plugin, I recommend using Role Scoper to limit access (for example, if you wish to have some posts visible only to paying members).
I'm very excited about WordPress 3.0's support for custom post types. In the upcoming version of my plugin, a comic will no longer be a post in a certain category, but will be a post with the "comic" type. Finally! However, I'm beating my head against a wall trying to get Role Scoper to work…
I've found the Realms tab. I've checked the box for "comics." I've even jiggered the activation hook for my custom post type so that it loads before Role Scoper does, so that box stays checked.
So I go to the newly-visible "Comics" item under Roles, and I see that there are no roles defined and no visible means of doing so. OK, that may be fine. To be honest, I find that part confusing. But the upshot is that my Add New page for my custom post type lacks the Role Scoper meta box. I'm sure the two are tied together, but I cannot figure out how.
Any assistance would be greatly appreciated.
Brad