There will NEVER be a web browser on the Zune. The reason for this is that user input would be impossible. How would you enter text? How would you click on links? If you were to think of a good way, it would be time consuming and just lower the image of the Zune.
The Marketplace is possible, but it would have to be totally rearranged and redone. It is NOT as easy as you think it would be. Also, it would have to be very watered down due to the same lack of a mouse/keyboard issue.
Just remember: all you have to work with is a D pad and 3 buttons. The Zune is great, but there is not a lot you can do with that combo.
__________________
|