Social Bookmarking in Plain English from CommonCraft.com:
Social Bookmarking article in Wikipedia
Simply Del.icio.us! by David Muir (a how-to guide)
Social Bookmarking Tools from TeachingHacks.com
David Warlick’s Del.icio.us Guide
Becoming a Delicious Power User
Social Bookmarking with Del.icio.us:
Filed under: delicious, social bookmarking, social media, web2.0