Yesterday the latest Style Hatch theme, Ascender, went live on the Tumblr premium themes garden. Ascender is an evolution of the popular Transcender theme with a grid layout, better styling for the built in light and dark modes and full Typekit support.
The first update for the theme is already in production which will include infinite scrolling, better iPhone/iPad support so that you can disable the default Tumblr iPhone theme, and a few other surprises. All the theme updates are free and automatic, and they come with Zappos-like (or Nordstroms if you prefer) customer support. Email - email@example.com