Coding Horror (Jeff Atwood) - Excellent writer with a lot to say about how software development ought to be done, fun stuff about technology and games, must have tools and utilities, and regular doses of slick code.
Sam Gentile (feed) - His "New and Notable" linkblog posts are solid, he's got a lot to say about Test Driven Development, and he's a glutton for punishment with all the latest Windows Vista betas. [links updated]
you've been HAACKED (Phil Haack) - Phil and I met through our blogs, and now I work with him at Veloc|IT. It's good to read your CTO's blog, even if he weren't as frighteningly smart as Phil. Good stuff on ASP.NET, code from his work on SubText and RSSBandit, and practical info on using patterns and framework design in real life applications.