Here are a few links of interest in Human Computer Interaction...

link bullet ACM's Special Interest Group on Computer-Human Interaction - http://www.acm.org/sigchi/
ACM SIGCHI, the ACM's Special Interest Group on Computer-Human Interaction, brings together people working on the design, evaluation, implementation, and study of interactive computing systems for human use. ACM SIGCHI provides an international, interdisciplinary forum for the exchange of ideas about the field of human-computer interaction (HCI)
link bullet Human-Computer Interaction Resources - http://www.hcibib.org/
A portal for HCI related material including news, developer resources and HCI publications.
link bullet Human-Computer Interaction Institute at Carnegie Mellon University - http://www.hcii.cmu.edu/
Information about the HCI Institute at CMU, current research and projects.
link bullet HCII Seminar Series - http://calendar.cs.cmu.edu/hcii/events
Dates and topics for the regularly held HCII Seminars at CMU.

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 Center for Interdisciplinary Research on Constructive Learning Environment - http://www.pitt.edu/~circle/
CIRCLE's mission is to determine why highly effective forms of instruction, such as human one-on-one tutoring, work so well, and to develop computer-based constructive learning environments that foster equally impressive learning.
link bullet Intelligent Systems Program at the University of Pittsburgh - http://www.isp.pitt.edu/
The Graduate Program in Intelligent Systems serves as a center at the University of Pittsburgh for advanced education and research in artificial intelligence and some related areas of cognitive science.