Google explains it's new open source, Webkit-based Chrome Web Browser with a 28 page comic book inked by Scott McCloud. The Chrome browser beta becomes available to Windows users on September 2, 2008. Mac and Linux versions are also planned.
Jakob Nielsen's Alertbox reports on their study of sitemaps, observing that among the sites they tested, sitemaps continue to be a useful tool to some people. While their study shows that they are rarely used, they can be simple, inexpensive tools to generate for the users who find value in the sense-making cues that a visual overview provides. Their recommendation is to continue to use them if you already produce them, but keep them static and don't add interactive effects to them.
James Kelway's article on wireframes in the User Pathways blog summarizes what the different types are, what their purpose is, who the audience for their use are, and how they are typically implemented. There are several nice illustrations in this article for those that need to explain what they are.
http://userpathways.com/2008/06/26/the-what-when-and-why-of-wireframes/