Its been confirmed that Martyn will be releasing a Fabric mix early next year. I can't wait, he's one hell of a DJ/Producer. I'm pretty sure its going to be on a house/techno tip, but then everything Martyn does sounds like Martyn music anyway so we will have to see hey.
He mentions it here as well as giving out a link to his Fever Ray remix.
p.s. I hope everyone has got Great Lengths by now, quality album. And his track on the hyperdub compilation is something else.