Ask HN: Blogs focused on smart software design

I read plenty of blogs on coding and running businesses, but don't know many that focus on making good design decisions. I mean things a product/program manager would do, like:

- Coming up with creative solutions to design problems

- Creating good usability/user experience (e.g. Usability Post, http://www.usabilitypost.com/)

- Scalable, extensible design or architecture (I see this a lot in discussions of standards and programming languages)

Does anyone know of blogs focused on smart design? (It doesn't even need to be focused exclusively on software; good/bad design can be spotted in all kinds of technology.)