I've been trying to extend an existing plugin to have more options that I need. The documentation page http://docs.moodle.org/dev/Course_formats doesnt mention the ability to put any configuration pages in for a course format plugin. Anyone know a way I can do that?
We do this in the OU course-format. The way we do it is to add an extra edit icon on the page (when editing is turned on). When you click that icon, it takes you to a separate "Edit course format settings" page.
To add to Tim's response - you can manually implement custom settings pages, as he described - but you can't have 'standard' admin settings in a course format. I believe this feature has been added in Moodle 2.4.
I came across this recently for a new site I'm working on; luckily, I was also creating a new theme for the same site, so I was able to add all my settings inside the theme's settings.php.
Are you looking to add layouts to courses? I've built a custom one, you need to add a DEFINITION_VARIABLE in /lib/moodlelib.php