One thing you might try: in the demo, dragging items is missing a bit of "pop"; this is slightly intangible, but it doesn't quite feel like you are picking up something and putting it down.
Not sure if it's this way in the actual app, but you might check out the way that Trello slightly tilts cards when you pick them up, and drops a bit more shadow.
Obviously that's minor: the product as a whole seems solid.
I definitely know what you mean, Trello has a really nice effect. Right now we're using vanilla HTML5 drag-and-drop, so that experience is basically controlled by the browser, but we're working on customizing it.
One thing you might try: in the demo, dragging items is missing a bit of "pop"; this is slightly intangible, but it doesn't quite feel like you are picking up something and putting it down.
Not sure if it's this way in the actual app, but you might check out the way that Trello slightly tilts cards when you pick them up, and drops a bit more shadow.
Obviously that's minor: the product as a whole seems solid.