Okay so I want to create a website that has multiple different communities within 1 domain. I want to make it so that once they register for the MAIN community that they then have access to all the keyword specific communities. Like if I had a community about Colors. When you go to the main domain colors.com it would be a community about ALL colors, but then if you wanted to just talk about the color blue you could go to that specific community and everything in their is about blue. but it only requires one registration to get access to all of these communities. Does anyone have solutions to this? and what would be the best way to go about this. Wordpress? Joomla? I want each community to have a blog, and forum.