My company will be buying a new WordPress server this summer and I want to move our current WP instance to it when it arrives. The only thing is I don't want the current database structure to go with it. Basically, we have been running WPMU since 1.2.1 and I know there are tons of unused database tables and entries that I would not want migrated to the new instance of WP. The only way I can think to do this is to export each site(about 400) and then import them into their new site.
I really don't want to have to do that for 400 sites. Can someone tell me there is a way to do this without having to export/import 400 times?