My name's Nathaniel. I'm a co-founder of a new company called MetaBright. I learned CSS specifically to help build this site, so your feedback would definitely be appreciated.
People use MetaBright to prove their skills, typically in programming. Our users build out awesome profiles that provide a clear demonstration of their abilities. We think this is a way more effective way of getting a gig or finding talent compared to traditional resume-based hiring. And this is especially true for people who have limited work experience, or don't have a technical education. You can check out my profile to get a sense of what we're doing.
If any of this resonates with you, I'd love it if you'd check out the site and let me know what you think. http://www.metabright.com/challenges/css