Do want to have #tags. Since we have categories. It’s nice to have a global search but it also seems like just putting in OSAlt->Linux makes more sense then just tagging #linux. Or it just becomes redundant.
Do subcategories make sense to people? it’s not super intuitive to navigate but when you choose a category like OSAlt. You have a drop down right next to it when you post to select Linux, web-dev or any other sub categories.