I've been listening to these guys for for ages now, I think they're amazing. They're an acoustic duo from The Blue Mountains in New South Wales, Australia. Have a listen to some of their stuff:

Safe to Say

Believe it or Not

Calling Me

They have a heap of other songs, but I can't seem to find the ones I want on YouTube. If you're only going to listen to one, listen to Safe to Say, it's an amazing song.