Well I would go with 3 showcase forums too (or tags as mentioned above):

SC1: stand-alone/learning-purpose stuff
(get C&C to enhance your skills to do a certain thing (modeling e.g.))

SC2: projects-wip
(get C&C to enhance your projects and find bugs)

SC3: projects-finished
(showcase your finished project and maybe learn something for future projects)

just an idea though