I've been working a website called YumHacker since I've finished the 180 project. It's a restaurant discovery app using Rails as an API on the back end and Backbone.js on the front end. I learned a lot with the 180 websites project and working on a full scale app has been really great for taking my skills to the next level.
Making myself publicly accountable was definitely a great motivator but my biggest take away was getting over the fear of being wrong/judged.