I've added a couple of extras today. One is one of my favorite boards to use, called "FoldedPaper" which is a darker blue and gray texture with a slight diagonal hatch to it. I like it because it's such a neutral, attractive dark coloring but the pieces all still pop visually.
I also added a new chess set called Rursus, which was taken from an all-purpose font called Rursus Compact Mono. This set was requested by user "chess24."
Both of these are available at the lichess section of my website:
http://gorgonian.weebly.com/lichessorg.html