And why can't I post or add items to the queue?

The ability to 'lock' an item from movement would be handy for placment
(still selectable, just not moveable until 'locked' unchecked, for example)

The ability to 'nudge' an item in specific increments (or just pixel by pixel) by using the arrow keys would help in exact placment of said items.

It would be nice to be able to quickly duplicate text or objects already placed on the canvas.
This would also allow for a hacked 'drop shadow' effect by duplicating/changing opacity/setting behind original text/object. ;)