Changing the Slug of Sites within WPMU

Hi There,

in a project we plan to allow users to create their own blogs on our multisite installation.

So far, so good. As the blogs/sites are always related to topics, we would like to create different slugs (50) where the sites are related to. Example:

domain.com/main-topic-1/sub-topic-1/website-1

domain.com/main-topic-1/sub-topic-1/website-2

domain.com/main-topic-2/sub-topic-1/website-1

and so on.

Do you think that would be possible?

Thanks, Tee