I have a site which i built using WYSIWYG Web Builder, if any of you have ever heard of that. I had an idea that perhaps I could allow people interested in the same topic as me to add their own blogs to the site. Is this physically possible? Could it be all automated? If so, how? Thanks!
From wordpress 3.0 onwards multi user function is enabled inside wordpress itself instead of wpmu. So, you can just setup your wordpress if you are using it for multi user function. Having said that, decide before opening registrations and do not provide it to everybody as it will become a spam blogs attractor. Here you go. http://codex.wordpress.org/Create_A_Network
If its a custom made site, you will need to work a bit. Allow users to register for free, and allow them to post on your site. But for each blog entry keep track of who is the author...