WordPress MU

I have a question for the wordpress masters.

I have installed WPMU onto a bluehost site.

I am want to allow for other users to create multiple blogs I would like to be able to map the domains like the following or similar

http://www.mainsite.com (wordpress MU installed on this site)

http://www.2ndsite.com
http://www.2ndsite.com/miniblog1
http://www.2ndsite.com/miniblog2

I don’t want the main site url to be seen by the 2ndsite or 2ndsite mini blogs. Is this even possible?

Another idea was to just have two separate wordpressmu sites installed but, I have heard that you shouldn’t install multiple wordpressmu sites on a single account with Blue host.

I appreciate all your help!!

You need a multisite plugin that allows the blogs to have sub-blogs.

Thanks for the answer! You help out a ton on this forum.

Do you think this is a good route to go? or am I setting myself up for a lot of problems down the road?

Well, I use it myself on a few sites.... :D If what you want is blogs with sub-blogs, then yeah.

And yes, it works in 3.0 as well, but the terminology is changed.

What is this plugin called?