[cd34]

Neither wordpress or wordpressMU will allow you a single admin for multiple sites. If you run 25 wordpress installations, you have to go into the admin in each of the 25. That is really only a problem if you are accepting comments and moderating them. If you are not accepting comments, you probably won't log into the admin areas often.

If you want to do that, you need to use something like Blogs Automator, pull feeds into that, and resyndicate out to your network. TPat and a few others would be able to talk more about that side of it.

Whether to use MU versus plain wordpress is up to you. MU follows Wordpress and their version is not quite as up to date as wordpress. Many addons do not work in MU, however, upgrading is as simple as upgrading one installation rather than 25.

The better question is, why do you want a number of separate blogs? Since categories can be used and a post can go into a category, you could have domain.com/category be one category and domain.com/category2 be another. There are mods that allow a template to be selected based on the category.