Here you will find a list of resources I recommend if you want to know more about Interaction Design.

Websites

Jakob Nielsen
useit.com

Cooper Interaction Design
cooper.com

User Interface Engineering
uie.com

Jesse James Garett
jjg.net
The elements user experience - diagram (pdf)

Books

Interaction Design
Alan Cooper
The inmates are running the assylum (review pending)
About face 2.0: the essentials of interaction design (review pending)

Jesse James Garett
The elements of user experience (review pending)

Webdesign / webdevelopment

37signals
Defensive Design (review pending)

Peter-Paul Koch
PPK on JavaScript (review pending)

Design in general

Bruce Sterling
Shaping things (review pending)

Peter Morville
Ambient findability (review pending)