I chose longsword for right hand and spells for my left.
Staves look to be one handed in Skyrim with the screenshot and several concept art shots of them being in one hand, so you can most likely use a sword in one hand and a staff in the other and so on.
Concept art isnt a very good gauge for how stuff will end up being, gameplay-wise. And I was referring more to whether staves will be an actual weapon that you smash people with, or a spell casting kind of deal.
And for either case, I wonder what skill, if any, they will be a part of?