http://wmpoweruser.com/?p=4020
I'm not very familiar with Samsung's other device UIs but from what is shown in the video in the link above I think I like the direction their going. I really like the form factor of the Mondi device as well. That screen is a good size, for me, with the device not being overly bulky. I suppose I would use it more as PMP, but then a MID is an accurate description as well.
What do you think?