I've been trying to get this to work and I'm almost there. A few more things to work out, maybe someone can help.
1. Do I need to create a blogs.dir in wp-content? I have one but it's empty.
2. I bought my domain names through a registrar and have a vps through another company. How do I park the domains that I add to the wpmu ?
3. If I'm logged out of one of the blogs that I added to the wpmu, when I try to go to the blog's dashboard from the main wpmu site, it makes me log in again.
Any help is appreciated.