It would be nice to have some sort of project inactivation feature. This would basically do the following in an automated way:

1. Pause all schedules in the project, and recursively, any of it's children.
2. Prevent future builds from being performed
3. Remove all "checkout" areas, as this tends to end up being dead space for inactive projects.

I know you can delete the projects, rather than inactivate, but we'd rather keep the build history around, and not have to manually cleanup the disk, as we are doing now. Our builds take a lot of space to create, and the checkouts areas are the major things that we have to cleanup on a regular basis on the command line.