How to incorporate multiple box covers?

[Shad]

Dedicating a new thread to Robin's question, how should we incorporate new box covers for an existing game?

• In the Library index (this page) should the new cover be shown, the old, both in some sort of tiled arrangement?
  
• On the game's page, show new, show old, show both, alternate somehow (timed flip, or mouseover to see alternates, etc.)?
  

I'd like to hear what my users expect! I don't have strong feelings towards any solution at this point.