I've read this is possible somewhere here in the forums, just haven't found a solution yet.
I've got a root blog, let's call it root.com. I've got a second blog at bloggy1.root.com, and I'd like to, when users register at bloggy1.root.com, have bloggy1.root.com become the blog they've registered for, not root.com.
I don't need to have registration at all on root.com, if that makes a difference.
I can code something, I just need to know what I can hook into in the WP registration process; basically where is the user assigned a blog in the reg function?