I picked one up today. I am very satisfied with it. For a $400 TV, it sure looks nice, and it's a good size upgrade from our 32" Sony LCD (which can now be moved to another room, awesome). Nothing about it makes you feel like it's a cheapo TV. The packaging, printed materials, etc. are all pretty good quality. The box is great -- pull 4 tabs and then lift off the top. Really nice! The pseudo-720p resolution doesn't matter a whole lot -- my only HD source is my Xbox 360. Of course 720p is more noticeable on a 42" than on a 32", but that's how it goes. Now our seating is a lot more flexible, and we can move the couches a little further back.
Oh, and it is a pretty big box. Not heavy, but definitely very big in the width dimension. I'm 6'1 and my arms couldn't quite reach the handles to carry it comfortably by myself. I could drag it, or get one hand one one handle and the other on the opposite corner of the box, but not both handles. I can definitely see a smaller person not being able to carry it. It *barely* fit into the backseat of my Saturn SL. (Apparently plasmas are not supposed to be turned on their sides?) I had to roll down the window on one side to let the top corner of the box poke out.