The blue Netduino boxes are actually shipping boxes, not product boxes. Most resellers will ship the Netduino in its black conductive bag alone...they know how to protect electronics for shipping without the extra box.
That said, the blue boxes do look nice. So a few resellers buy them as an extra bonus for their customers.
Got mine from CoolComponents, and it came without the box in a jiffy bag, if someone had put any pressure on the package those headers would have snapped stright off
Luckily it was all good, loved the colour scheme of the board and bag/label (how awesome does the board look powered on!), and the tag sticker was a fantastically geeky little touch