Usability 
I just discovered the personal blog of Ricky Cadden, one of my favorite mobile writers. And it's available in mobile friendly format Ricky's the Editor of Symbian-Guru.com and Tablet-Guru.com, as well as the News Editor at MobileBurn.com. On his blog Ricky covers everything mobile related especially tips, opinions and observations on the mobile scene. The site uses a brand new version of Alex King's Word Press Mobile Edition plugin which supports themes and is obtimized for touch devices like the iPhone while maintaining compatibility with older non-touch handsets.