Tom,
I was about to ask a similar question. I host a site for an alumni group and I would like each person in the group to have their own blog without mounting a subsite for each person.
I don't think this is the way it works though. In my case I can mount the blogger on the group subsite, but I would have to make it writeable to everyone in the group. This sort of works but not really. It is an interesting concept though I think it is not so much a community based package.
Please correct me if I am wrong as I haven't mounted the package yet so I am not sure.
