Ink is cool. There are a surprising number of templates out there now, too. Brian Graves has a great site of resources with a template section at http://responsiveemailresources.com/

I also released one based on the template we use at Litmus to accompany an article in A List Apart. Article - http://alistapart.com/article/can-email-be-responsive Template - https://github.com/alistapart/salted