I think I might have the answer to this, but I didn't see a post about the specific setup that I was looking for, so I just wanted to make sure.
We are setting up a WordPress 3 blog installation with a Network at a domain, say, http://www.example.com.
We would prefer that the blogs on this installation be split up into two (and maybe more in the future, but for now two) subdomains, say:
group1.example.com and group2.example.com, where the address in the URL should be at group1.example.com/myblog and other blogs should be at group2.example.com/anotherblog
We could install two instances, but keeping once instance would be ideal
My next thought was to see if we could create the blogs at an address like http://www.example.com/group1/myblog and then we could just map any address that's at group1.example.com to the blog located at http://www.example.com/group1, but it doesn't look like it will let me add an additional directly like that when creating a new blog.
Then I ran across a couple posts using the WP Multi Network plugin, but unfortunately there doesn't seem to be a lot of documentation about the plugin online.
So I guess what I'm wondering is, could we do something like this:
Create 1 network called "group1" and another network called "group2," create multiple blogs under each network, and have it set up so that it can pretty easily forward addresses from group1.example.com to the blogs in the group 1 network, etc. without having to do mapping for EVERY blog individually?
We can handle the domain mapping ourselves here, but we just don't want to have to do it for each blog individually.