Mastering BizTalk: if you are learning or already using BizTalk, this blog has lots of useful, UNIQUE tools and tips. The author writes and teaches BizTalk courses all over the world.
Web creativity and autistic logic - all under one roof! I really like this guy's blog. He combines technical stuff (without the MS slant required by BizTalk!) and well-researched and -considered posts about autistic spectrum disorders.