Quite a simple suggestion, really. I guess it would not really be necessary, but still quite useful being able to give custom names your chests. To do this, I'd recommend right-clicking the front of a chest with a sign in your hand. This would attach the sign to the whole length of the chest's front and give you a one-line input panel.
If you mouse-over any chest with a custom name in building range (the small black borderline around the block is visible), a tooltip with the name would appear over the chest, just like with items in your inventory.
If you mouse-over any chest with a custom name in building range (the small black borderline around the block is visible), a tooltip with the name would appear over the chest, just like with items in your inventory.