Have adapted the BE category control to order categories and sub categories as nested lists.
The obvious benefit is that you get a visual representation of your category structure,
This control is not dissimilar to what Raisr has done with categories in his ChannelPro theme.
You can choose whether or not to show RSS icons, it's optional, as are post counts.
I only need to use it as a control, but if it's of interest to anyone I'll make a widget.