International:

AIGA Resources
http://www.aiga.org/content.cfm/aigaed_resources
Has a list of relevant books, articles and online tools, the artifacts and presentations from AIGA events

British Design Council Resources
http://www.design-council.org.uk
Features in-depth information and advice on design issues and disciplines.

As we may Think by Vannevar Bush
The essay 'As We May Think', was first published in The Atlantic Monthly in July 1945 looks way ahead at the networked world.

Core 77
http://www.core77.com
The most important online magazine for design with great resources - news, articles, discussion boards, links, list of firms and portfolios, job postings, etc.

Dexigner Design Portal
http://www.dexigner.com
Dexigner design portal connects the design world with news, announcements, articles and links.

Design Boom
http://www.designboom.com/eng/
European design e-zine with online online courses, articles on education, design history contemporary design, interviews, etc.

Design Observer
http://www.designobserver.com
Writings about Design and Culture - you can add your comments to the discussions after an article is posted.