In reality, you are better off starting at one of the index sites, like the SIGCHI site or Hans de Graaff's HCI Index and working out from there because they probably do a more consistent job of updating their collection of links.
Human
Computer Interaction resources - directory of Human Computer
Interaction related websites.
SIGCHI's WWW site
Hans de Graaff's HCI Index
The Usable Web
The HCI Resource Network
The HCI Bibliography