Having moaned and groaned about lazy publishing below, I thought I'd make a better suggestion. My personal German Publisher of the Year is Wolfgang Hörner of Galiani Verlag.
Not purely because they're the only German publishers who send out newsletters expressly to translators around the world, recognising that we can actually push the odd lever in the publishing industry. Not just because they always name their German translators, even in their Facebook status updates. Not only because Wolfgang is a totally and utterly nice guy who puts a personal touch into everything he does. Not merely because Galiani is the nearest German publisher to my house.
It's also because they have a fantastic and eclectic and risk-taking programme of literature and non-fiction, with everything from debut novels to award-winning daring prose to intelligent crime writing to banned Soviet geniuses to butterflies. I'm looking forward to Karen Duve - usually wickedly funny - on how to eat in a morally acceptable manner. I'm already in love with the blurb, in which she assumes she can continue drinking Diet Coke while only eating organic, as it's made entirely of chemicals (Why do I love writers who love Diet Coke? She's the second one I've come across.). The book comes out in January - and oh look, she's going on a mini-tour with Jonathon Safran Foer. Yum.
Sadly, the love german books German Publisher of the Year award does not come with any cash.