Todd has spoken of possible iOS apps in the Bethesda podcast and the most recent Norwegian interview - nothing concrete, just the usual evasive "not no" answer.

I'm not hoping for an iOS port, that would be infeasible, not to mention tragic to see something so epic reduced to that scale, BUT there are many possibilities for tie-in apps. I've already mused on an iOS-based inventory app featuring your character screen, maps, collected books etc. which can be accessed when you are away from the game.

Any other ideas?

What did the Norwegian article elude to?

"- Do you have anything gameplay-wise out of the game? For example, through websites or IOS applications.

- This is something we've thought a bit about, and we continue to play with."

from this thread:
http://www.gamesas.com/index.php?/topic/1189517-part-02-todd-howard-interview-norwegian-magazine-gamerno/

Thanks for the link. Hopefully they have something for Droid too.