This is a band called The Pierces. I love them, I saw them with MM, supporting Albert Hammond Jr, a few years ago and I've been spreading the word ever since! This is a video for an acoustic version of a song off their new album, which I think is out in the UK in March. They're also playing a gig in London soon, so if you live there go and check them out on my behalf!!
They're on facebook, twitter and myspace (plus their website, linked above) if you want to hear some more.
I know I do!