With the new mass-editing feature it's at least possible to move a bunch of hosts to a different folder. But it would be much more convenient if the dashboard view would allow drag/drop to different folders. And perhaps reordering as well.
Alternatively, if the navigation pane would support multiple selected items that could also solve the issue.
The reason I'm very interested in mass-editing is that I'm currently working for a customer that has about 1500 servers so manually moving them one by one is not too convenient.