Good Web UI/Usability Blogs

Recently, a few colleagues, friends and pseudo-random internet acquaintances have asked for usability/web-related blog recommendations.  Today's post is a link list of blogs that I've found to be either useful, informative or interesting enough to foment some of my own ideas.  My goal is not to deflect anyone for continuing to ask me for recommendations (honestly).  I'd be interested to know if any feed readers already check out these blogs or have their own recommendations to share.