Err, I may not have been explicit enough about independence from Earth's food supply. Soylent is more of a marketing thing than a space food thing, but the approach (don't make food, make chemicals) seems at first glance to be a more promising route.
Rob Rhinehart's food replacement Soylent now has a crowdfunding campaign.
If you're interested in one or more of these benefits, send in some money! There is also a new blog post.