Animated Panel version 3

As I wrote before there is annoying problem with AnimatedPanel that it is not possible to animate both removing of item and items movement. Few monthes ago I found very cool features called Behaviours and Interactions (from System.Windows.Interactivity). There is a predefined behaviour there called FluidMoveBehaviour. Using this behaviour it is possible to achive something similar to what AnimatedPanel does. I'm investigating this behaviour and it looks very promising! I hope that next version 3 of AnimatedPanel will leverage on System.Windows.Interactivity and will offer better functionality.