CyberPsychology & Behavior
The journal Cyberpsychology, Behavior and Social Networking is an excellent resource for cognitive designers working on Internet applications of all types. High quality and readable articles reveal many designable insights and loads of psychographic information.
You can sample a free issues in December 2009 and February 2010. For examples of material relevant to cognitive design issues check out The Theory of Planned Behavior Applied to Young People’s Use of Social Networking Sites or The Attitudes, Feelings and Experiences of Online Gamers - A Qualitative Analysis.