One-handed is very useful. I've been to more than enough communities to know that every game has a number of fans who prefer using just a one-handed sword. Personally, I always whine when another great game comes out without sword-and-dagger dual-wielding options, so I can understand their perspective, as well. It doesn't have to be the most powerful thing, really, it just has to be viable.
same goes for unarmed. polymorph i wouldn't know, i don't play mages =)
