My initial thoughts are to keep them separate, because it would be too easy for the 3d images to overwhelm the 2d images that most will come here for. There are already decent amounts of the 3d stuff one sites like imagefap and tumblr. It is also really easy to start your own booru too (see here
http://booru.org/create)As for the name change, I looked over the admin panel and couldn't find anything. There was a post on the booru.org forum (
http://forum.booru.org/index.php...mp;forum=2&topic=211) that someone resolved, so I suggest making a post there about the name change, specifying which booru and what the name is and should be.