Dear Admin,

In the past, I've had success implementing the great menus and selection scripts available from Treeview... I think they are one of the leaders in these types of Javascript, CSS & Dynamic Tree Presentations for sub-categories.

Here's a really good example that I think could almost immediately be applied to the existing Upload script: http://www.treeview.net/treemenu/3fr_checkbox.html
To download and check out more examples: http://www.treeview.net/treemenu/download.asp

I think this will be an EXCELLENT addition... i'm really looking forward to sub-categories to reduce the confusion from listing too many Channels.