A growing number of metal labels have set up a Bandcamp. 20 Buck Spin has done a fine job integrating theirs with the rest of the website. My favorite 20 Buck Spin release at the moment is Laudanum's The Coronation. Some of the of the most gloomy and desperate sounding music I've ever heard. It almost feels wrong to call it beautiful, but it is. Beautiful and crushingly heavy.
In a great review bt Michael Wuensch, once available at Last Rites, he echoed the same sentiment, only much more eloquently: "The Coronation ebbs and flows from ominous darkness to clouting heaviness like waves of rumbling sickness".