A great new resource for learning web design was announced at webplatform.org. It’s a wiki and participation by knowledgeable web designers and developers is needed. That said, it’s already a huge resource of the best information available.
Congratulations to everyone involved in this effort. The group calls itself the Web Platform Stewards, and includes
Paul Irish has a lot of good ideas about how you can contribute to the site in Why I’m So Excited about Web Platform Docs.