"...a free web newsletter that is produced by the Software Usability Research Laboratory (SURL) at Wichita State University. The SURL team specializes in software/website user interface design, usability testing, and research in human-computer interaction."
Welie.com. A pattern library with over 125 patterns for Interaction Design. All patterns are illustrated with examples and links to literature and occasionally code.
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Chapter 4: Designing for Collaboration and Communication.
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