Interaction Design: Companion site for the book "Interaction Design: Beyond Human-Computer Interaction," by Preece, Rogers and Sharp. On this site there are a variety of resources and activities to support one's exploration of interaction design.
TaskZ: User-centered technology books, articles and links.
The Interaction Designers Coffee Break: Posts, articles and links about interaction design organized by subjects.
UI Design Webzine: Articles on interaction designers, book reviews, editorial and interviews.
Usability News: Information in usability and human-computer interaction.
Usability Views: Articles classified by site, date, title and popularity.