My box was sealed with two round pieces of tape on either long side and a big piece of white tape with a barcode on the short side
The case was sealed in a bag in the bottom of the box. And the xoom had all paperwork etc. And plastic on the screen.
Mine also has a dead pixel or screen issue in the corner so i have to exchange too

Its RIGHT under the "back" button placement, so its really easy to notice in normal use.
OP, seems like someone got fresh with your Xoom before they sold it to you. The least they coulda done is re-sealed it lol. If there's no problems I wouldn't be worried about it (there is a 90 day return/exchange anyways) but I personally woulda asked for a different one if mine was presented like yours was.
Here's the picture of the screen imperfection: (sorry kinda has to be a big picture to see the dot).
It looks like a pin-point white dot, right under the "back" button placement. It shows when the screen is off as well. I'm assuming the issue is on the glass, but based on the fact that u can see it on the panel under the glass too I cant tell which is causing which. Either way I'm gonna go snag an exchange soon.