“Project” specific discussions. Broadly speaking if there is a Project in our community that is either a core 1BitSquared project or enough people in the community are working on, we will create a subcategory here for that particular project. Otherwise you can use the #topics:show-and-tell topic category to share the project you are working on. We always want to hear about the things you are creating. 
(Moderator note: There should not be any Topics directly categorized as #projects)