I can't imagine (and most reports seem to agree) that this would be a one off thing. Surely Malkmus has seen the example of the Pixies and figures their fans have disposable income now.
So there's another in the list of shocking reunions happening. How long til Bob and Grant decide there's a ton of money to be made in doing a reunion tour playing "New Day Rising" or "Zen Arcade" in their entirety?
Are you sure that all of the nominations are accurate? After all, you _can't_ seriously have that incredibly trite and overrated piece of dreck known as The Rising in the Best category for anything other than hype, can you? Tim